Nice looking master!
If it were my bait, I'd make a silicone mold and pour one, and then rig it with one of the biggest belly weighted Owner Beast hooks, to give me something to start with in my testing.
Once you get it to swim, you can see how the tail wiggles. A lot will depend on the plastic you use (hard/med/soft).
I use a medium for my 7" plastic swimbaits, but I've never poured a 10" bait, so I can't help you from personal experience.
The more belly weight you add, the more stable your bait will be, and the faster you can retrieve it without it rollling over.
If you first prototype's tail doesn't wiggle enough, you can widen the master's tail with bondo, and then make another silicone mold. A flatter, more circular shaped tail will catch more water, so it should wiggle more, but it will also make the bait want to roll more, so you'll have to experiment to see what works best for your bait.
Good luck!