What do you think about drilling the sprues in the second half of the mold instead of gluing poles onto the keycap? I'm having trouble getting the poles to stand 
I dunno! I've never tried anything but the vertical sprues. I thought about doing them on the side because it seemed easier, but my reasoning was:
1) air bubbles want to go up so making them turn and go out of a hole on the side seemed like it might cause bubbles to trap.
2) I didn't want sprue marks in a noticeable area. Putting them on the bottom makes them fairly easy to clean up and I don't have to worry about a blemish on the side of the cap.
3) messy! with the holes on top, the excess resin will usually pool up on top and I don't have to worry as much about getting it all over the place.
Yea, it's a pain in the ass to get them to stay upright! A lot of patience and a tiiiiny bit of super glue do the trick though.
Awesome guide, helps a lot. And the keycaps are awesome love the colors.
I'm a complete newbie were it comes to cast resing, I would like to know which ones you think are best and will they accept any pigment ( like mixing some watercolor paint with the 2 part resin for example. Sorry if it sound stupid, I really have no clue how resin works 
)
I haven't used many different brands of resin so I'm not sure! I use pigment drops made for resin coloring though. I have tried to use a few other things like fountain pen ink (ha) but got varying results. I haven't tried watercolors... but I would not recommend putting water in with your resin at all if you are doing it that way. You don't want ANY water in your resin.
