I added an RB Models turned barrel (though Aber has now also released one for this kit).
I went a little overboard with the photo-etch on this kit. I’d had the Royal Models update set for quite a while but it doesn’t include some of the parts I wanted such as the main ammo locker and the blanking plates for the exhaust air outlet. Through MiniArt’s Facebook page, I discovered two photo-etch sets from Ukrainian vendor V Models which provide many additional details that are either simplified or missing in the MiniArt kit.
The kit provides individual link tracks but they lack the openings inside the guide horns so I replaced them with Master Club 35036 metal tracks.
Immediately upon commencing construction, I was reminded that the kit does not exhibit the level of sophistication we have come to expect from Tamiya, DML and the like. There was flash on many of the parts, the fit was sometimes questionable and niceties like locating pins are largely non-existent. The kit is definitely buildable however – you just need to take your time, clean up the parts and test-fit everything before reaching for the glue.
Construction begins with the gun. This is basically a kit in itself and I plan to build and paint it separately, then add it to the vehicle during final assembly.
I added the RB Models barrel and found that the cut-outs machined into the barrel were slightly too large for the kit parts that wrap around it. However, I found that if I seated the kit parts toward the breech end, the rearmost gap was covered by the brass collar from the RB barrel and the foremost gap was hidden inside the recuperator cover.

The big 'trench' on top of the recuperator cylinder is meant to be there, so I refrained from filling it.
The breech block needed some love. There were sink marks on both halves and the mating edges of the parts were rounded off, leaving gaps that needed to be filled and sanded. The work was tedious but not difficult. The breech itself was too wide to fit between the halves of the breech block, but I corrected that with some light sanding.

The photo below shows the completed gun and shield assemblies, ready for priming and painting. The muzzle brake is only temporarily attached at this time, since the gun shield/recuperator cover won't go on with it in place.

More to come as the build continues...