I think we may have chatted about this at the choo choo's?post vodka tho so....
Would probably be best to use a spare 43 for this.Remove soviet buttons(or hammer the design from them) and replace with any period buttons. Then make/find a pair of wool shoulder straps (cut mine from £3. greek bd blouse) which should be sewn in place unlike the standard 43 pogoni. Jobs a good un

Soviet pogoni would not be worn under any circumstances though as this is specifically RKKA where as the basic shirt and breaches are just the basic bds for the east.
A good view of the "modified" lwp 43 gymn' can be found in the otherwise dodgy ospray Polish forces 39-45, the troops in the train wagon show an interesting mix of uniform and kit.
kai.
speaking of which, i think ive solved the powder blue uniform mystry.......a copy of a just post war,iejune45 "Polish Soldier" magazine shows colour tinted pics of lwp where the uniforms have a blue haze to them....so does the grass and trees but maybe ospray got confuzzzed