I've read a post on another forum about converting archtop guitars to mandocellos just by using a a new nut and saddle. The suggestion is to keep the C and G strings single - this way no extra tuners are needed and the tension on neck can still be comparable to a guitar setup. It's also reversible, e.g. just a nut/saddle swap.

What do you think about it and has anyone played a MC in this way ?