Nice job on both of those oldies. You really should give resin a go. Hobby Fan does really nice kits. I still have to finish a couple of SPG’s from them.
The tracks on this kit would do well as resin tracks as they truly were “rubber band” tracks. Linked tracks don’t always look good in resin as they curve unrealistically. Most people will tell you to use boiling water but I find that rarely works well. Once I have the upper run installed I mask off what doesn’t need heat and blast the tracks with the wife’s hair dryer. Perfect sag every time.