Big Bad Wolves
Read the CAA AD and Note 98.
All the isues which people have raised here have all been addresed within that note and the subsequent approvals.
The simple fact is that low compression engines were not designed to run on 100LL and all this stuff about how dangerous Mogas is in comparison conveniently ignores the fact that these engines were not certified to use 100LL.
They were approved on a paperwork basis because it was the only fuel available.
Anyone remember all the issues flying clubs had with O-235s running on 100LL?
Anyone tried running a Gipsy continuously on 100LL?
I have run my all the aircraft I have owned on it (they all fit within the CAA approved list). No problems, no issues.
Follow the steps outlined in the CAA note and enjoy some flexibilty and cost reduction in your choice of fuel.