Here's something I just finished a few days ago.
The bottom clamp is from the HT chain tensioner, the top plate is hand made uisng electric hand drill, dremel and bench grinder.
The plate is 5mm mild steel, the blue is "blue compression engineers marking dye" to mark out the punch holes prior to drilling.
What's being tested at the moment, is I left the engine mount studs original for now( where the cosmetic dome nuts are), so if it snaps I just ezi-out, rather than go through the hassle of trying to drill out hi-tensile bolts.
If it passes then I might replace the HT studs with the regular upgrades uisng hi tensile allen key bolts.
Also, if a hi-tensile bolt snaps on the alloy, it does much damage when owners who have ready made bikes, but not "feel" for things mechanical.
They just keep riding and don't understand minor regular checks and maintenance, things we tinkerers just naturaly do.
The next mount top plate, if this passes my bolt tests during run-in will be slightly differant, but this seems to work and much engine vibration seems to be absorb by the 5mm steel plate.
Leather helps absorb the metalics to.