That's awesome! I see you have given the travel a little thought lol!! I love the idea of the heater - I have neither heard of that before or even thought about it to be honest! Thanks for sharing!!

If you make a box... uh, I think you need to make two prototypes lol!

Glad the angle thing made a difference! Really glad! It takes some playing with but eventually you will not even think about it unless you change up you blade size rather radically. Sweet!!

Don't be afraid of water! A dry lather bites!! Big time. Moreover, if you add too much you can let it sit for a bit and then whip it up with some vigor into quite the foam. It always surprises me how much water my creams will take. That - or just dip your brush lightly into some water over and over untill you get the amount of moisture as you like.

Exciting stuff!! Oh and yeah - try just adding the 12K Naniwa for now. You have the 4/8k Norton - that's fine. I can't remember if you have a bevel setter or not but with the blades you have - you should be fine for a long, long time.