How about this issue with GSP... and it happened to me....!!!

A friend bought an ARC, big Cap from GSP... and asked me to complete it for him...

There was no manual with the plane ... OK... so I downloaded the manual from their website and printed it... no big deal...

I put the plane together... and I've professionally built 100s of planes... the plane looked and went together fine.

I balanced the plane according to the specifications in the GSP manual... no problem.

The 4.2 roared to life and the plane lifted off... sort of OK... but the rest was fearsome...!!!!

The plane was wildly unstable in pitch...!!! and I immediately knew that it was very tail heavy...!!!! An eventful 5 minutes ... slighest up elevator and it pitched straight up...!!! not good...!

Finally got it on the ground... messed up one wing and one stab and elevator... and cracked the fuse... Did I screw up in balancing... I was under the gun...!! Took the plane back to the shop... put it back up on the balancer... CHECKED the manual... it was right on the balance point the manual said... The only conclusion... the manual is wrong... !!!! I called GSP to inquire about the CG... and sure enough it was an error in the manual... The published CG was off by 2 inches!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!

I asked GSP for replacement parts because of their mistake... Seemed like a reasonable thing to do... No way!!! Siner was an @$$ ... of the first magnitude!! I built it... it was the builder's mistake...???!!!

To make a long story, shorter... after several snail mail legal letters, and a outpouring from all my club members... Siner gave in and provided parts and funds for labor...!! I have the worst taste in my mouth for GSP....!!

Here's the kicker to the story... Six months after the above incident... I checked the manual online... and the "in error CG" is still there... did they change it... no way!!! THIS IS THE GSP WAY!!! STAY AWAY FROM THEM...!