Reply To: cricket question
Sometime the delrine bushing are over size at the rear of the shroud, there is no oring to seal to prevent blow by. And sometime overly tight then I have to bore them out. When I see a vary loose one that affect the accuracy I install an oring groove on that delrine to seal and aligned the shroud.
if you have no POI issue then it’s ok to have a little blow by—-you can call it a air vent. For me I’m know to drill vent holes at the end of the shroud.