i note the "chain tensioner"...i had one on and the fkn thing made such a screaming noise i had to take it off ...it was hard mounted like yours...(it was one those cheap wheels off a the bottom of a fridge.) .too bad you can't see that BSA up close those guys put the tensioner on moveable spring loaded bracket..worked great and didn't make all that bloody noise.....
the shifter you have on is wild...although i sure like having my shifter on the LEFT side!