I used to use the mk1 when i went with my dad then we packed in. I still have my old mk1 nut when i started again i went out and bought the mk3m. So glad that i did. The old mk1 was good in its day but i find that the mk3 is far far better at being accurate and once you get the hang of it its really easy to use, never fails. The only down side is the anoying noise it makes lol
So if it was me i would defo go for the mk3 mate