12s4p battery (not sure about BMS/no BMS)
Flipsky 6384 waterproof 140kv motor
Flipsky 75100 pro v2 VESC
Flipsky VX3 pro remote
I’ll figure the rest later (box, etc)
I have a couple boards in my quiver to try (North 140L wing board, Naish 135L inflatable wing board, and a small 35L slingshot Alien Air kitefoil board)
My front wing is a 2000cm slingshot
I’m 90 kgs
The focus is to foil around our flat lake for short periods and hopefully start doing some ocean downwinders (once I gain some foiling skills).
Thoughts?
Good starter build, but I use the 75200 (works also without water cooling).
I started with 75100 and it overheated quickly, also considering you are heavier than me and you are also using a bigger front wing.
The bigger boards will get you easier on plane than the kite foil board if at all with such a small board 
Maybe you also consider the Flipsky 7070 motor as it has little bit more torque.
Thanks Chris. I’ve heard using a 12S battery (mine will be 12s4p) keeps the heat down in the vesc. What battery setup were you running for the 75100? Also curious what cooling you implemented: water, radiator plate (fins) on the exterior of the box, passive in the box?
Also 12S4P but it depends on the cells you want to use. I used Samsung 40T3 which may run warm to hot only when run down to low voltage. I did only run passive cooling which was right about enough as the battery lasts roughly 35 to 40 minutes depending on riding style.
I’ve read a few times that guys would opt to bypass the BMS for discharge protection and just use for charging. Is the reason cost, space in the box, or does it screw up the delivery of power for the vesc/esc? If it’s the latter, is this possibly because the BMS specs were too limiting for the power draw? I haven’t been able to find this answer yet.
I believe that it’s absolutely important to implement some type of balancing during the charge cycle - how that accomplished has a pretty broad approach.
From the posts here a number of people have had some type of issue involving the BMS during discharge. That doesn’t mean that if implemented correctly that’s a BAD strategy just MORE complicated to implement and therefore more prone to issues occurring.
It would seem if you have a quality build battery pack the risk of having an issue where a BMS would need to intervene during discharge is small. If it’s not a quality BMS implemented correctly it might not even be capable of doing the job anyway so why increase complexity and cost is the question you should ask IMO. 
Any experience with the 75100 pro v2 vs the 75200 pro v2 for my build? Chris, did you have your passive cooling through the box like in the foil drive+ box, or all in the battery box? I wonder if through box and the occasional water splash on the radiator is enough to keep this vesc cool enough for 1/2 hr foiling sessions. (maybe not since I’ll be falling a lot at the start?)
I appreciate you aren’t asking me the question but I did make a start at this by building a box on top of the board (that I already owned) type build.
My logic was to use possibly overrated and therefore possibly more expensive type of VESC for my build as I wanted to be able to or not be concerned about that essential component failing. When you think about it it’s the “brain” of the whole rig so not a good thing to have crash out.
Space constraints aside the weight and price differential of the two choices you mention are not very far apart.
Lots of posts here where people are choosing the absolute minimum VESC or ESC based on price or size where they smoke the “brain”. Try swimming a disabled board to shore once and you will think about doing it differently again. 
I was thinking the 75100 pro v2 was playing the safe side. But now I’m not sure. I think it’s rated for 100 continuous/ 150 peak. Is there a post that delves into the amp draw for peak (takeoff) and for continuous (once up on foil). I saw one recently and now can’t find it.
It sounds like the 75200 pro v2 is just the safer option though to ensure I’m covered for heat isues
Well based on your stated use case… full Efoil at beginning on flat water - assume you are new to foiling and fairly big from a weight perspective means a LOT of demand on the components - Then out in big enough waves to foil assist but might need to power in if you get tired etc. and a top of the board box that isn’t severely space constrained as pure minimal foil assist would demand I would lean in the direction of a big VESC that won’t burn out quickly.
Investing in a higher end VESC would allow more flexibility if you decide to rebuild to full Efoil and is less likely to leave you stranded or broken down mid learning - that was my thinking but up to you to know what’s best for you.
Appreciate the advice, I would rather overbuild than underbuild, so I’ve ordered the 75200 v2 pro. Any thoughts on a 3D-printed prop versus buying aluminum? 2-blade vs. 3-blade folding?