Bing 54 flooding at idle on decent

[Flymax]

I have 2stroke 2cyl. opposite WALTER M202 engine with 2 BING 54 carbs and the same problem. At iddle it has 1700 rpm., but at descent 2500-2800., and fall they down just after touchdown. I have done everything, but I can,t belive, that this problem we have just we two! Have You solved it? I know fuel quality screws on my carbs are almost closed for best run, and I think, there is no air intake for iddle rpm. and carbs work at next "low rpm. level". Iddler jets orriginally are 50 , so I think to change them to 55 , open quality screws, and descend carb. pistons with quant. screws. Have anybody tried it? Thank You for Your help!