hi Guys i am new to this group and there seems to be a lot of talk on the Viper. I have just completed the first part of a article for the english mag RADIO CONTROL JET INTERNATIONAL ON THE Viper mk2 which will be published next month. i am soon to do the test flying so we will see if there is a real problem with it . My impressions of the kit are good and if it flys as good as it looks there should be no problems .