Well, my cello teacher had never even heard of removeable pegs. But also now I've found that setting the cello on top of a very thick book also helps a lot. I guess making the cello more horizontal thus making it easier to get the pegs behind my neck while still keeping it a bit further away from me. So, I'll try to just do that. Although the book is quite thick. May have to get a bent end-pin I guess.
I'm playing the first two pages (of three) now of Romberg's sonata in c major somewhat decently now. Managing to add some decent (at times) vibrato.