I have run a number of adaptors in raw alu. But I do take apart after each session and wash properly.
Another alternative is self etching spray and the gun guys all swear by Cerakote.
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I sprayed some paint on it, just to be sure.
Just got this beauty delivered 
Fit is tighter than the original, and I got it in anodised 7075 since it wasn’t a lot extra.
I’m really happy with how it turned out.
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That’s nice, who did it for you?
I got it from PCBway. Easy order and great finish, can recommend them.
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What is the difference between an axis mast and a gong mast? Why is it worth to make adapters?
The gong is about 17mm wide, axis 19mm and material is thicker on the axis mast. There will be a huge difference in stiffness since the bending resistance is proportional to bxh^3
19^3/17^3=1.4 so 40% stiffer, even without the increase in thickness
And axis base plate fit was better than any gong i’ve had.
Looks fantastic!!!..was it pricey??
K
Yes, and no. I paid for fast shipping which drove up the cost but the part itself was about the same as an original Axis doodad. They have quite some markup on their stuff…