Progress:
The tracks (which may be on backwards, but they look OK to me) are on as a test. They drape nicely, but they are delicate in a couple of spots. The grenade launchers are copies from a 1/35 Tetrarch paper model, only in plastic.
The .30 cal on the turret is from the Academy US machine gun set. It's very nicely detailed for plastic. I even added a small section of ammo belt. The .50 cal in the turret and on the glacis are spare barrels from the same Academy set.
The periscope on the commander's hatch is modified from a Tamiya T-34 periscope.
The external fuel tank is from the same Italeri BT-5 that donated the wheels and bustle.
The weathering on the tracks is from Doc O'Brien's Weathering Powders. It's the first time I've used them; I used a wet brush, dipped it in the powder and brushed it on the tracks. I need to re-apply it in some areas, but overall, they seem to work well. They can also be applied dry.
Still need to add some details: headlight & grenade launcher wires, radio antenna, periscope section inside the hatch, secure and cap the wheels then it's on to decals and weathering.