I use a very limited set of tools: pencils (various grades/colours) and drawing pen (0.05mm an 0.1mm). It has been my preferred method for years. Unfortunately, most of my work is from many years back, and architecturally inclined (key influence being Charles Sheeler). This is the first of my planned watch based studies. I hope to complete the next one in the coming months although I have set myself a serious challenge.
Regards,
Baruch