The starting point:

Starting operation weight reduction:

I've tried direct dry ice, crushed dry ice with rubbing alcohol slurry in various ratios, inverted air cans with various hammers, but I can't seem to find anything that will work ANYTHING like the myriad of you tube videos showing this stuff come off in whole chunks/sheets. Back to the heat gun - seems to work better than slowly chipping away.

After a few evenings of that grueling noise, I chose to do the only logical next step; to start cutting up an 01E to fit an 07K and truly commit to this project... I grabbed the closest GBE transmission in the garage and got this:

And just for fun, a preview pic of a TTRS head vs 07K:

I haven't decided which head I'll run, probably the 07K and save the TTRS head for a build that doesn't require a piddly 34mm restrictor