Converting the XV109 Y'vahra

I did a post earlier on the Y'vahra when it was first released HERE. I picked on of these bad boys up because I felt it was too awesome to pass up. Rules-wise, it has all the right elements that the XV-9 should have had. It is risky but can be devastating if used correctly. Sounds perfect to me! I already run a high-mobility, battlesuit-heavy army and I am hoping that this guy will give me what my list lacks: instantaneous response.
The 24" thrust move (which currently can be used every turn until it is FAQ'd) is insane and allows you to threaten stuff your opponent normally would think safe, and on turn 1.

Imagine your opponent is using an invisible, gating Centurionstar (boo!). You get first turn. You pop your Nova and try to get the 3+ invulnerable in close combat. You thrust your Y'vahra right up to the star, hit it with two full templates of S6 AP2 ignores cover. If the psykers are the closest model, the S8 ion weapon could be insta-gibbing if they get unlucky with their LOS. You are probably going to kill some stuff.
Then, when your opponent thinks it's over, you charge the Y'vahra right into combat. He is essentially helpless this turn against you, because he hasn't had a chance to cast Force on his psyker weapons. You do some damage and get stuck in with your 2+/3++ or 2+/4++ if you failed the Nova roll.
His super deathstar is now hurt and tied up in combat for his first turn. He can't shoot your Y'vahra and will have to hope he can get an instant-death force attack through your invulnerable shield. Either that or commit a close combat unit to help kill it and waste precious movement time. Bwahahahah! If the Y'vahra dies, you've bought yourself time and probably caused a fair bit of damage to the star before it goes invisible and starts gating. If it doesn't die, you can try to Nova jump out of combat to come back later. You aren't really hurting your chances of shooting the Centurionstar in the second turn, because it would have been invisible by now anyways.

Now, let's say you are more conservative and you worry you'll end up going 2nd. You can put it in reserves and use it as a quick response model. When it arrives from reserves it can move on 24" and roast stuff before your opponent can respond, still granting you first strike with your potent model, even if you won't be able to roast that Centurionstar.

I can't leave models alone. I have to cut them up, magnetize them, customize them, improve on them. You'd think an expensive model like the Y'vahra would dissuade me from risking total loss of resin gold, but no. Like the R'varna, I wanted this to be usable as a regular Riptide so I had to scratchbuilt arms and magnets. It also required a sufficiently awesome base.

Starting with the base, I wanted this to convey a sense of  blowing past entrenched positions to get at the real hard targets. A scorched Astra Militarum position was just the ticket. Poor burned guardsmen, all they ever did was stand between the Y'vahra and the Leman Russes...

I swapped the head with the targeting piece from the Aegis Quadgun. I felt it scaled better with the model, and fits perfectly with Tau aesthetic.