Try `www.tigerclub.co.uk`,as they`ve operated them for hundreds of years.tel(0)1622 891 017. Seem to recall oil soaked fuselage and fin-post probs. Their engineers should be able to give you a rundown of SBs and ADs.
Another one is the LAA as they look after Permit a/c.
Nice a/c to fly,better than a Tiger for aeros,but keep them `gentlemanly`.