Issue resolved!
Got my parts in last night. Tore down the mech box and installed the delay clip: issue remained. Cracked it open again and swapped the nozzle with one just slightly shorter. An AK nozzle infact and now every shot is feeding and no FPS loss.
Left the delay clip in as I was too lazy to do another tear down to get it out :P
So parts used:
SHS AK Nozzle with O-ring - Long
http://www.airsoftstore.ca/index.php...products_id=32
Lonex Sector Gear Delay Clip
http://www.airsoftstore.ca/index.php...products_id=12
Thanks once again for the suggestions.