Base PC4-M6 larger collar opening

thingiverse

I tweaked Karkovski's remix to perfectly match the pc4-m6 pneumatic fittings I had on hand. A distinguishing collar on these fittings proved to be slightly larger than the original design's collar, so that was taken into account. The rest of the design remained unchanged. By doing this, the fittings can seat completely, which optimizes the filament path.