We were having this discussion on BBC and a couple of guys swapped from Maxxum's to Fortrex/Ultrex's and did not have to drill any holes.
When I looked at my Maxxum and at the Fortrex/Ultrex's at my dealer with the holes they used to mount mine I will more than likely have to drill to mount my Ultrex when I get it.
The Fortrex/Ultrex mount has several holes in it so you might get lucky.
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2016 Ranger RT188 Charcoal Metallic Dual Console
2017 Yamaha 115 VMAX SHO (VF115LA) SS Prop