Well I went all the way with my booster.
1) Rx antenna mod(I use some pretty heavy gauge solid copper wire)
2) Rx cripple cap removed, yes there is a cripple cap on the booster Rx as well, it is in the same spot as on the non-booster Rx. How do I know? Well I removed it and my booster has better range, more importantly, it still works!!
3) Telescopic antenna on the booster Tx
4) Fresh batteries in the Tx, this may have made the biggest difference
Anyway I'm well over 20' range now, Im very happy with that!!!
My favorite part about this is that now we know even though the booster and non-booster Rx boards have some differences, the cripple cap mod works on both!!!