Yeah what happens is the plastic on the ez start around the owb isn't strong enough to cope with the tightness and compression of the picco and it quickly looses its shape which allows the owb to move and jam up the ez start.
I also fitted a hpi savage flywheel ,clutch and clutchbell as the trx clutch is way too weak.
Don't let it put you off though cos once you've fitted a 1/8 tuned pipe and gear up a few teeth the picco is a beast and your will be a flying machine