I had a K .45 for a while but it blew up on me twice so I ditched it.
They require a lot of oil (205 if possible) and low nitro to get them to run right. They don't run high nitro in Europe or Asia as a rule because of the high cost of it there so the engines are built that way.
If you need a remote needle for it, Andy Brown at www.cmdracing.com sells them. His remote needles are the Kalistratov's and you need the coarse threaded one and large fuel line.
Al Hobbs is one of the very few people here in the US that carry the engines and parts although Andy Brown does have some parts but you won't find them on his site.