Dazz, I guess you were on tenterhooks waiting for a follow-up reply, eh?
When someone enquires what the size of the model is, or what voltage/props you have, I guess it's a human instinct to assume that more info. will be forthcoming.
I was in a similar situation as you at one time. You don't wanna hear the grizzly details, but in short, the questions I asked were never answered.
So rather than pester my peers with questions that had "newbie" written all over them, I took the bull by the horns and went about some experiments of my own. I dabbled with anything I could get my paws on. Auto windscreen wiper motors... auto heater motors... cordless drill motors... Speed 400... 600... etc, etc.
Same with the props. I simply dabbled with various sizes and pitch, swapping the motors, swapping the props, etc. until good results were found. Lots of disappointment along the way, but the fun and knowledge gained from experimenting is part and parcel of the hobbby.
It helps if you can experiment alone. That way you have no fear of the experts having a good chuckle at the expense of your failures.
From the knowledge that I gained, I've not used a store-bought motor since. They're waaaaay overpriced anyhow.
Stay with it.
And good luck.