Silent Industries Alpha with PDI 6.08 + R-hop?

My best results so far trying R-hoped barrels with Silent Industries Alpha chamber. I'm not happy at all with how my gun shoots - you can see lots of vertical inconsistency here and this is the best combo "bucking - lips tension ring - nub". I've tried all 4 tension rings and flathoped G&G 'green'q Madbull 'blue', Madbull 'red', Krytack 'orange' and Prometheus 'purple'. The most consistent result (least shots with vertical deviation) I have with Madbull 'red'. The main reason for this is not the chamber but the nub. The stock trolley even with modification is not suitable for M-nub longer than 4 mm. With 4 mm you don't have even enough contact with a 6 mm R-hop patch. 3D printed trolley with solid base for 6 mm M-nub overhops even with hop turned off. The M-nub must be shortened with the necessary precision to provide the flat surface contacting the patch.
#Silent_Industries #Alpha