If you need to print support in slic3r but are having trouble getting the support to stick to the bed, you can try to use a 2-3 mm brim.
Print Settings->Skirt and brim
Slic3r adds a brim to the support and the printed part by default. This can help the support to stay around even when it is only very thin lines.
The brim is fairly easy to remove from the part with knife.
I have some nice pieces printed at .1mm but you can see where I removed the support.
My extrusion width for support is set at .25, think i might take it down even more.
Designing your own support is a good idea, I had thought about it but never attempted it.
Anybody got any shots of their custom designed support? Are there any best practices on how to design for easy removal and without damaging the part? I know the Form 1 printer support looks kinda like a needle, with the thin end contacting the part and the large end contacting the bed.