Guys - theres been allot of talk on this and other forums about not using a power box royal and heavy airpower evo valves etc because of adding unnecessary weight etc.
(My viper 2m is now finished and been flown twice with success)
But after i had bought the Royal and the evo my heart sank when lots of people were saying not to install them ...... id already spent the money so what was i to do ?
I spent the whole build worrying i was going to end up with a heavy model and maybe something that would stall easy and spiral to the ground!
so after reading absolutly every thing on rcu re viper 2m's i decided to at least get the turbine as far forward as possible - i cut the intakes right back - even the seam etc
to cut a long story short when i came to ballance the model ( 12.5mm infront of spar) the weight i had to ad to the nose was next to nothing - just 2 small flat peices approx 1.5" x 2.75"(inches) so if i moved the ballance point back to the main spar ( where i think Ali has his) there would be probably no extra weight to add!.
Point being if the Powerbox royal and evo valve wasn't there then i would be adding the weight of these anyway to ballance the model!!!

Just wanted to clear that point up!

Richard