I got an m3 tap and tapped all the wheel screw and roller holes, and the various turret bottom plate screw holes etc. Didn't want to force the screws in like I had to with the rotor shield retaining screws. I used lock tite on the screws for the return rollers since they are shorter and hand rolling the rollers the screws would partially turn. Also I had to drill out the outside wheel of the henglong return rollers to fit over the head of the screw so it would roll freely without grabbing the screw head and turning it. Shown in the picture below. I do have metal return rollers from the wheel kit I bought but a friend told me that the plastic return rollers roll better than the metal ones so I am going to go with them first and test out the tank.

Got the lower hull painted with a color coat. I can see a few more areas now that have grainy line texture from printing that I should have sanded but I going to let it go. Too far now to go back and re do it when it wont be seen unless you handle the tank.
I have about 6 or 8 coats of black primer on the upper hull deck. It has a wider line pattern from printing that can be seen in the right shade of light angle or when the paint is wet.
I wish the upper hull had been printed plain, and required all the details and tool boxes added to it so that it could be sanded smooth and finished nicely. Now I am going to have to sand the rear and front areas around the detail, especially the headlight assemblies to get a perfectly smooth finish to paint it with color. HAving the hull with all the details printed on it saves a lot of time if you don't care about the finish of it. Kinda sad. Now it takes more work to sand around all that suff and make it look good.

Also found that the metal abrams sprocket I bought doesn't fit on the taigen gear box shafts lol. Had to run the gear box full speed at 12v with a model train power pack and use a file to turn down the shaft diameter a few thousandths to get the sprocket to fit lol. Im hoping to be able to test drive the chassis soon with the IBU shows up. Then I can start setting up the recoil etc and move further with the turret internals.