MacGyverek wrote: I am using now 4.01 version. What about model.ini compatybility?? There is any changes??

I saw something about bug with swap AIL, ELE channels.

I played around with 200QX and 1-2 more models on V4.0.1, then older nightly-build, then newer nightly-build.Model.ini files were not incompatible as far as I can tell. Might depend on setup.What bug id are you referring to?The AIL ELEV channel bug which is known to me is for CCPM120 flybar helis but it is more Cyclic1Cyclic2 swapping instead of AIL/ELEV.Different behavior for advanced mixer GUI, simple mixer GUI, FBL, CCPM120.Hexfet and PhracturedBlue did not (yet) touch heli mixer C code, so in 5.0 release you have to fight with the same things as older releases/nightly-builds.There are about 3-5 heli threads with more detail informations and linking two Mantis bug ids...Update 17/09/2016:Yes, there are still known heli issues - and also some new issues (not seen before) with the committed heli templates according to several posted threads after 5.0 rls: www.deviationtx.com/forum/6-general-disc...eased?start=60#53953 If you upgrade you would need to check all your models (correct servo movement, mixers) anyways...It happend to me once that my heli cyclic servo was swapped normalreverse when I was playing with Indigos nightly builds and upgraded to one nightly-build.YES, IMHO you really should upgrade from V4.0.1 release: www.deviationtx.com/forum/3-feedback-que...-nightly-build#46790 Make a model backup first!!