Did you ever get an answer to your post? I've got the same problem. @21 oz s needed with a Saito 91 in the nose.
This company is the biggest piece of crap on the web ....he's got even worse quality than Horizon's products.
After reading posts from guys who bought products from this company I'm amazed at what they put up with from this guy.
From now on I'll always reseach products on the RCuniverse site prior to ordering from a new company any expensive or critical items.
Let the buyer beware!