I've finished the refactoring of it an am now happy with its layout and internal code construction. Basically, the old control I was writing delt with retro graphics in an abstracted way, and so you had to do some work to use it, now however the control deals directly with the raw format which means all you need to do is copy actual retro graphics data into the control and your all set.
So with this done, I've started to plow ahead with some features. Actual editing is obviously first, and I can now draw pixels with the mouse in both hires and multi colour modes. This is also true for C64 and spectrum editing. I've also put in sprite rotate left and right, and am about to do up/down.
Once I've done this I'll add colour picking. Currently I have 2 default colours and you can't change them - this obviously has to change to be of any use, and as its a biggie, I'll do that next.
I'm sure I listed these before, but it must have been ages ago so here it is again; the feature list I want in for version 1.
If theres anything else that you think is a must have, then let me know. I've no idea how long this will take me, but the sooner the better. Currently it lets you edit Plus4, C64 and Spectrum sprites although I still have to put real support for the C64 sprites.