I havn't driven, so can't comment on the AH Sri t but sounds like they're slugs compared to the TS Sri t.....even alot of mag reviews have said the same.
I have test driven the VXR and wasn't impressed, so maybe the lower power Sri t does need more guts
As far as rubber blocks been left in there, that's disgraceful !! More shame to GMH......
How long have you been driving with them, hopefully no damage has been done, you must have noticed, the ride wasn't normal at all or car sitting a bit high ???