work on the very tip of your awl out to the widest part it should slide through that, and your thumb, without much pressure at all. Plus some wax beeswax is best on your chisels will help with pulling them out. i used to chisel all the way through, still do sometimes but i also just chisel the first layer before glueing and use my awl to finish if its to thick of a project. I also just use an awl sometimes. Another method i use is to chisel the first layer, glue the welt on then chisel through that. Then lay the third layer in place and mark the top chisel hole take it apart and chisel the whole stitchj line on the third layer use some small brads or nails about every inch to line up all the chiseled holes then glue the third layer down to the welt. I dont use this much anymore as its faster to just glue the third layer to the chiseled two layers and push through with the awl. Also get that cork the leather wont bend then makes it much easier!!