I got to thinking and did some calculations and if Idid not screw up 1/35 panther tracks should be almost perfect for both the panzer 38t and the Lws engineer vehicle. the width is perfect and the linl length is very close. If you use fruil metal workable tracks the series of vehicles should be fairly easy to do. I havent checked but I think the 1/35 th panther tracks would be a close fit for the panzer 2 also.