High helix blowers always throw all the fuel to the front at idle. The front two are OUT and the back two are burning up. For extreme cases like yours, I employ ball-check nozzle bodies on the front two hat positions. I set them to about 16 PSI and they are completely OFF at idle and on above that. Works great. In one case, we did the front four like that and the engine idled off the back 4 only. Two of those 4 were in the hat, the other two were in the back of the blower.
Going down the track, the front two will be leanest generally, so the ports are staggered the other direction.
Spud