Thanks all for the positive comments, to answere your questions:-
1, The tow hitch is the one supplied with the kit, all i did was add the lower section and blend it in with some filler. note the attachment bolts are put in the opposite way round to the instructions.
2,The rectangular plate on the bottom of the hull was made out of some sheet steel, the attachment bolt pattern is not quite correct as i decided to pick up some of the existing holes from the supplied round access panel.
The other major item that i changed was the mudguards and their mounts, these are supplied as early/mid versions and are not correct for a late Tiger. To change them i found some steel door hinges of the correct size at my local hardware store, cut them ot shape and brazed them to the supplied mudgaurd. I then cut new ribs and brazed these in position. the fixed parts of the hinges are again from the same door hinges, cut to shape and bolted to the rear plate.
Next job is the zimmerit
All the best
Steve