UPDATE -- kom vityaz reports that:
+++ the short-stroked and lightened piston works well with 8.4v ACM batt pack powering a Chaoli motor to crank a PDI 190. ROF a little over stock spets ROF
+++ plus 3, more or less, rps when powered with a 9.6v ACM batt pack.
+++ with the BH 11.1v 15c Li Ion --

ROF (thanks to kom alakdan for the charger adapter plug

)
+++ quad mag tweaks done. he is now repairing the failed HLK drum mag