Whatever you do, don't buy the Gasoline 1/48th Stuart full kit (OOP now), no matter how cheap the offer: The tracks are basically unuseable, and it will likely be severely shrunk assymetrically on one side...
Even if it is NOT shrunk, the Gasoline Stuart's front corner angle upper hull plates, and even the overall hull pattern, is not symmetrical IN BASIC PATTERN DESIGN by a long, long way, even though the original tank was...
Look at any built-up example you find on the web, and you will see the upper plating on one side looks absolutely nothing like the other side...
This assymetrical pattern shrinkage (or poor basic master design symmetry, as in the less common Gasoline Stuart case), is periodic in all resin kits, but much less so on conversions than on full complete kits, which are almost always the real gamble here. Full kits are not only far more often crooked, but much more expensive as well.
Some makers like Belcher Bits, Rest Models, Hauler and probably Fighting 48th seem to have a better handle on this. I think transport temperature variations over long distances could play a role in the shrinking/warping the resin during shipping. Still, it seems the maker still counts more.
Be wary of flat plate assembly designs over more reliable solid one-piece non-hollowed-out parts, although my Belcher Bits 80 ton German flat railroad car was straight in its components, if inherently difficult to assemble, being made of 7 large and long thin pieces.
Long thin flat pieces are otherwise usually to be avoided at all costs, but Rest Models from Ukraine are incredible in that even the smallest resin rifle is dead straight. Their 2 German horses kit is amazing in that and other respects: Probably some of the best resin I have ever bought...
There is usually no problem in solid-moulded chunky conversion parts, like non-hollow Sherman turrets for instance. I am wary of anything long, thin and especially anything flat like a flat plate hull, rear bed or cab assembly. Don't even consider long gun barrels, even if Hauler's short KV2 barrel is flawless and dependable because it is short and thick (superb internal rifling on top of that). Hauler's resin seems like it would be dependable and stable no matter what it portrays...
In the Gasoline Stuart, the shrinkage problem stemmed in part from the hollowed-out upper and lower hull design, a much more dicey resin concept it seems, for some makers, than a solid hull...
Even absolute top quality resin kits like Accurate Armour are not immune: I took a fall on their "heavy ambulance" (flat plate rear hold assembly) which was severely assymetrical in a way no amount of carving could fix, as was some of the thin main body mouldings. Their Coles crane truck was OK, and had only the one piece solid cab being hollow: Much less risky than multiple flat parts...
I strongly suspect Spencer Pollard's build of the Accurate Armour ambulance had the exact same assymetries as mine, but he makes no mention of them...
Buy full resin kits or even resin conversions with extreme caution, by looking at the part breakdown design, and ignore all the cheerleading. Fully expect to take a bath on fit/symmetry on any one of them at any time.
The required use of the cyano glue's short adjustment time (no hold/sudden freeze hold) on resin is another roll of the dice, but at least there you have some control...
Gaston