Here is my tamiya T-55 built mostly OOB. I replaced the barrel with one from RB model, and some copper wire replaced the piece of string in the kit for the tow cables.
this kit really falls together, the only fit problem i had was at the front of the hull where the upper and lower pieces meet. i had to fill a small gap with some stretched sprue. the RB barrel did need a bit of persuading to get into the mantlet.
the rear tow cable is left sticking out until the wooden log is attached later as it wraps around that.
let me know what you think