HPB,
Just been looking at the figures. The A109E has an STC allowing an AUW increase to 3,000 kg with a change of landing gear. According to the Flight Manual, at 30 degrees at SL the 109E can take off clear area up to 35 degrees with no restriction. Can't see why you'd necessarily want full fuel, but after burning off some for start, if their aircraft has the additional fuel, it would probably depart with more like 660 kg. Perhaps you know something about the pilots Caverton has, but 90 kg also seems rather high for pilot weight. If they've done the undercarriage modification and with a rather slimmer pilot they should be able to lift off with a few hundred kg of payload.
Can't make any comment on any investment they've made as I have no idea what it might be. What have they invested in - apart from an A109E and the rather nice hangar on their website? I have to say it does say a bit like sour grapes on your part as it appears from your posts that you have been involved with this company but have now left for whatever reason.
