I had one of these, never completed it, but "ebayed"it partially built.
The first kit I had was abysmal. the moulding was seriously warped, and all ( I mean ALL ) the wooden die cut parts were separated from their frames.. I immediatley returned the kit for replacement, which in fairness, was done no quibble.
The replacement came, I ordered the fittings kit as well... parts were missing, I wrote to Graupner, they replaced them promptly.
My real "issues" came with the actual build... the bigger ply parts were very badly warped, some parts were just not made to fit, scratch building skills will be required !
Like I say, I abandoned the build as a bad job, maybe I was just unlucky ( twice ! ??? ), Dunno.. Personally I feel some of these very old kits should be retired.. instead of kept in production with the same old parts...they just dont live up to todays modellers expectations of quality ( IMHO)
It certainly is NOTHING like a Model Slipway build !!
I'd look for a more up to date kit, where, instructions and parts will be what you expect.. buy a dinosaur.... an thats what you will get.
For what it's worth, thats my personal experience of this one.