I've some of Mayner's wagons (brake van and open) and they are to a very high standard. I also purchased some of @leslie10646 's 00 kits (corrugated open, GSWR van and CIE cattle wagon) at Raheny. I haven't made them up yet, but again, there's very good detail and they come with all components required. Btw Leslie: have you any more beets??
I'm very happy to recommend both (although there's the very big caveat that I'm only beginning my journey as a modeller)