Help - Hard Starting

I am hoping someone can give me some advice. I have a 2010 M8 HCR with a Push RG (tial) set up. I am running 8 lbs of boost at 9000 feet elevation with a gas mix between 50-70% 110 and the rest 91. The sled is dialed in, shows 13's on the AFR, pulls hard, with vertually no lag/bog..

Sled starts o.k. in the morning (certainly not 4 pulls my my n.a., but she pops off similar to other turbo'd sleds), however, if I shut the darn thing off after working it, it is a beee-otch to start. Pull the sled 50 times, maybe..... Work the flipper, hold it open, try all the tricks of the trade to get it going. Yep, heat soak switch on/off, doesn't matter. It has never left me hanging, but a couple of times I thought I was gonna have to walk...

This only happens if you shut it off and try to start it shortly after shutting it off - like the time to help your buddy get out of an easy stuck. If the sled sits for 10-15 min, then usually not to hard to get going again. Runs good/idles down nice as well.

Running NGK Iridium plugs (BR10 EIX 6801). Checked plugs the other day and changed them - they were pretty dark (black) and icky looking, definatly not lean but not fouled either. One plug's top cap came off and stuck in the boot as I removed it. I have not had a chance to run the sled to see if the problem is fixed or not.

Any suggestions on what it could be or what I should look at?

Thanks for the input guys. I always let it idle down, unless of course I get bucked off. Hadn't thought about the reeds, turbo has only been on for 500 miles and doesn't have any other problems usually associated with reeds - I'll have to check. I do have the bdx high volume pump in, hadn't considered that either.

Thanks, more to look at and consider.