I use to hand awl stitch but I perfer to not bleed that much
The best way I have found to get good stitching lines is via 3 prong rectangle punch and mallet. I don't care for rubber cement myself but contact works for me after planing on distance from the gun. The punching the stitching lines is the last hole punched is used by one of the prongs to line up for the next punch so net you add two new holes... keep doing that until your done stitching. I like thicker waxed thread myself because it fills the punched holes and holds very well.
Note: Remember to plan on what to do first, second and third stitching assemblies so you don't allow you to add the leather loop for belt attachment. That would never happen to me
The paper form is very important and make it bigger than you need. I use to cold wet form the loose piece of leather around the gun (with plastic wrap) and that gives you a good idea where the stitching line needs to be. Use the contact cement, lightly draw where the stitching lines are going, stitch and lastly cut the excess leather. Finish the edges, hot wet form (hot tape water), dry, dyeing and top coat.
Hope this helps. :D