R1 engine in a Thou

[ChristoT]

I was at Tesco earlier, and a noticed a familiar looking bike outside. A blue Fazer Thou (with some unusual mods). Looking at it, I thought the engine looked a bit different, so when the rider appeared (and after I told him about FOC-U), he told me he'd fitted an R1 engine into the Thou (not the detuned jobbie you chaps have - from a bona fide R1)!

Anyone else done this? Apart from some corrosion on the block, it looked pretty neat!