Logic was that when you want to make inner exact diameter within 0,01 mm (for example 7,88mm) its difficult, because tool presses to thin wall of rotating alu sleeve from inside…. Instead they took existing M10 ss bolt from shelf, took down it on lathe to 7,99mm, did 6mm long M8 thread and job was done within minutes. Anyway, there is for sure more solitions, aim is to make the gap between bolt and sleeve about 0,01mm.I would like to know their logic. Let's say you used the stock bushings, custom reducers could easily be turned down on a lathe from aluminum (if not CNC'd or even 3D printed). Going a step further, you could start with a fox hardware kit and replace only the inner sleeve- a simple tube. Machining threads and a bolt head out of steel (or stainless) seems inifinitely more complicated.
Burgtec is another company to keep in mind. I wonder if their santa cruz bolt kits might include a match for the EXe.
https://burgtec.co.uk/product-category/products/bolt-kits/
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