uBass nut spacings

Hello. I am nearing completion of my second uBass build except this one has a more standard neck. I am after some help in spacing the strings at the nut please. My nut is 47.20mm. The thunder guts I have are E:4.91mm, A: 4.14mm, D:2.95mm and G:2.34mm. Where should I cut my grooves? Also should I cut semi-circular or v-shaped grooves?
Thanks
Max

Hopefully these pics will help
Rounded slots for the nut
Miguel

Thanks Miguel
Max

There are three ways to space strings. Equal spacing to centers, Equal spacing to edges and near enough is good enough.
Dan Hulbert did a uke bass with equal spacing to centers. It looked very different to the commercial ones I have seen that were all equal spacing between edges. In the end I don't think it makes much difference apart from looks.