Assembling the t20 but when placing the center plate it won’t sit flush on the clutch side against the case and gasket. About 1/4 “ raised. Not on the band pin, sun gear and washers all fit below the final c clip. I haven’t tried booting it all together for fear of ruining something but when the two halves are put together it won’t sit flush. I’ve put it together a couple times same thing. Any suggestions? Is my input shaft too far into the case?