Engines attached to procedural parts; the craft cannot hover properly.

[allista]

I think i find what's wrong, engines attached to procedural parts, so you need to instal procedural parts for this craft. When i tried to make stock plane i saw that the plane fly very well, with PP when on hover over accelerate and when goes down wait last moment to accelerate, but is to late when fly low...

https://drive.google.com/open?id=1GBLCs3RnCKRkjqzdiyidAbtKS-yBwec9