Alright so I got the kit installed two weeks ago. I added 32 oz of oil to the gas like it said in the instructions. I also left it in ethanol mode and added fresh 91 octane fuel as well.
First 65 miles had 3 detonation warnings and then the sled would shut itself off. The first two times it happened, the plugs looks fine. I actually fouled a set of plugs during a slow bumpy section. Not sure why. Third time it happened the plug tips were white and they had loosened themselves in the head. I could turn them by hand. Also, there were a few times where I fired up the sled and it would be idling at ~1000 rpm and would cause the gauge to turn on and off. I changed the reeds out to boyesen direct replacement reeds so I guess I'll have to get that checked.
I learned that the detonation could be cause by either too little weight in the primary or bad fuel. I know the fuel was good so I went with clutching.
I'm at 0-1000ft elevation and after talking with Chris at Parkland Motorsports and MTNTK directly I installed the SLP blue/pink primary spring, 70g epi belly buster weights and also removed the MTNTK timing key and put my stock timing key back in (MTNTK said the timing key isn't needed at my elevation).
After about 200 miles I haven't had any detonation problems, the sled pulls hard through the mid and top end (noticeably harder than stock). I'm super happy with it now. I am especially happy about the lack of det. I'm running 91 and I'm on ethanol mode.
My only issue now is the low idle after the sled is warm. I'll let it be for now, according to MTNTK it's probably just due to the amount of oil I put in for the first tank. After a couple of tanks it'll hopefully clear out and I'll be good to go.
I gotta give a big thanks for Chris at Parkland Motorsports. He was a big help on the phone and was always willing to answer my probably too many questions. He helped me figure out the det issue and actually called MTNTK for me to ask about weights and the timing key.