Nice vid, If you get the gdv diverter valve for the turbo it helps with the lag a lot on the m235i not sure if it would be plug and play on the m2. Also I think we have similar brakes (calipers) and with proper race pads ( I use porterfield R4) and proper fluid I can get 40 min sessions at sebring, although my calipers are now green
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That is not bad for a stock car, I am turning consistent high 27 low 28s in my 235i w camber plates, coil overs jb4 and m3/m4 lcas on r comps (only 235 square though, jealous of the m2 space for rubber )
Did you get any power loss in the heat, 235 did until I updated the inter-cooler.