IQRTurbo,
The pic with the trail tank:
What gas rack is that, and is it notched for the cooler?
I don't see the cooler in that pic, did you relocate?
My cooler is in the stock location, and I have a 146 track, will snow still encase? Will scratchers hit the location, will the scratchers that bolt onto the front ski's work better?
Sorry to get off topic, I've got the 10.5 trail tank in black with the same seat if you want to see pics.
The gas rack is one that I built to fit the same can that I run on my pro, made of 1x1 angle with holes to bungee can on. I relocate crossover tube to hug the back of the tank close in order to keep the can as close to the seat as possible.
I have the two stock coolers without the large one from the RR, and run 185 psi heads in an 800 and have never had cooling issues. Always sits around 130 on the trail with HRP scratchers down and the same in the powder with them up. I am set up in the short IQR as a 146 assault competion track with holz skid and love it for the riding I do with it. I do have a camo extreme 2.5 for the deep fluffy snow. Whoops a stock 155 pro without even touching the NOS button with either track on an uphill. You are on the right track with that sled, I have had it just about every length and absolutly love that sled at 146. It has been alot of work making it go through the snow well and easy to flick around but can honestly say it is WAY more fun to ride than my 155 pro and 162 turbo IQR. Just installed a Silber turbo today so the next ride may change my mind with the added snort in the pro.
Try pulling your steering post block out to get your bars back a bit if you find the front end heavy. It will move your feet back about 2'' and get you pretty close to the pro dimentions.
What are you running for a motor, pipes, air box?
If you have the means to modify your running boards it may be the best thing you will do to get it through the snow and sidehills better. I cut mine from nothing at the front to about 3 inches higher at the rear arm mount and narrowed them to about the same width as the pro and it was an unbelivable improvement. I then built a set of drop brackets to have a spot to bolt up. You will find your boards hanging up and hitting on sidehills causing you to wash out aggrivatingly often.