Thank you for the warm wellcome!
The bottom of the TD is sealed with warm galv. steel plates. This way I could use the space in the frame for insulation and protect the frame from weather tear and wear.
After skinning the TD I placed long alu V-profiles (10x10x240cm) along the edges to completely lock out any moisture. The insulation in the floor is 60mm thick and walls are filled with 50mm so I could in theory, be camping on the North Pole without getting cold
I'm currently waiting for the arrival of the aul mold/profiles I've ordered at Frank Bear/Vintek RV trailer supply, so I can finish the edges and the doors.
Since I can't find anything that resembles the fenders of the original teardrops here in Europe, I'm a little in doubt of what and where to order. Shipping costs is the greates enemy and apparently very few carriers can handle alu profiles in lenghts of 8'