I've been frustrated by several frames and either the water bottle mounts in the wrong spot to fit a battery, or none at all.
Several articles suggested rivnuts but I found that $150 tools were oppressive to my budget for a half dozen mounts and uses.
Some due diligence and what I preach, Googling, found a small hand tool version from the premier aircraft builders site, Aircraft Spruce.
$21.50 and First class shipping for a total of $25. eBay for a quick grab of 20 M6x15MM Stainless rivnuts for under $10 delivered and I'm in.
AS customer service tells me the mandrels are M4 M5 and M6
http://www.aircraftspruce.com/catalo...ickkey=1591357
Now I can mount my batteries where I want and even have my water bottle mount back!

Several articles suggested rivnuts but I found that $150 tools were oppressive to my budget for a half dozen mounts and uses.
Some due diligence and what I preach, Googling, found a small hand tool version from the premier aircraft builders site, Aircraft Spruce.
$21.50 and First class shipping for a total of $25. eBay for a quick grab of 20 M6x15MM Stainless rivnuts for under $10 delivered and I'm in.
AS customer service tells me the mandrels are M4 M5 and M6
http://www.aircraftspruce.com/catalo...ickkey=1591357
Now I can mount my batteries where I want and even have my water bottle mount back!
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