No I don't have an odds line - I'm very unscientific in that regard, I simply decide for myself what I consider to be the actual chance a horse will win based on the form I have worked out for the runners, and I also look (after deciding what I think) at the forecast odds, then decide if I'm going to get what I consider a decent price. This can backfire in that if I think something will win then any price beyond 4 or 5/1 automatically looks reasonable!
I did, early on, produce my own tissue but to be honest I was no wiser for what I produced!
At the moment I only work one or two races a day, the UKBF Common Thread race usually, which is done for fun (and, most days, pain) and one other - which is my main effort for the day you might say, and the one I am most likely to have a small bet on - this race is normally 5 or 6f with 10 runners or less, and I work out far more races than I bet on. Although I have, so far, been profitable with tiny stakes I need to get much better before having any sort of real go at this - for now it's more an absorbing hobby than a genuine attempt to generate excess finance
Dave