I've been watching this trail thing for a while now and been meaning to comment for ages... well... here goes...
Can I just say... Trails really only work when the underlying movement is Rapid... they're best used as a way to indicate further action in a limited frame count...
By adding trails to movement that allready reads well (and that's a compliment) only helps to confuse the message and messes up the overall motion and gives the impression of something extra that shouldn't realy be there (if that makes sense)...
personally I'd do one of 2 things,
1. Ditch the trails in favour of a higher frame count.
2. Reduce the frame count and keep the trails...
The stretch and squash you've got going on is really nice... plus the overeach (on frame 7&

help to emphasise the snapping action... it's a really nice sequence without the trails man... in all honesty you're overworking it now. Move on to something else.