Im getting through putting my 2nd Roo together, been flying an original mk1 since 1999 that has had a hard life and is looking rather tired so time to retire it and pull out a new Roo Mk2.

Question is on original Roo I used pop bottle for tank, new Roo I have Jet Tech 105oz tank. Can anyone tell me how far the Herex former needs to be reduced by to get tank in


Thanks in advance for all who respond