I'd try backing out the reg and the ivg all the way on a .682-4 back with our paint.. put over the crono and walk the reg in till the velocity begins to drop. Then use the ivg.
Jwalker has a box of main springs (mine) get one from him if the above does not help.
If all else fails find jacob or jordan at the field, yup the kids they are becoming quite good at trouble shooting.
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