Viktor Hovland is back in action at this week’s RBC Heritage, looking to build on a final-round 67 at Augusta National that carried him to a top-20 finish.

The Norwegian has been testing between drivers for the last few months, and the work continued this week at Harbour Town. GolfWRX’s Alistair Cameron caught up with Ping tour rep Spencer Rothluebber to get the details on where the testing stands between his current Ping G425 driver and a G440 LST.

According to Rothluebber, the tight layout at Harbour Town means the 425 is likely staying in the bag this week, but the 440 LST could be making its way in sooner rather than later. Here’s what the Ping rep told us on Wednesday:

On the 425 vs 440 LST decision:

“He’s definitely attached to his 425. It got too close to the starting line for him to make the change (at last week’s Masters), and the spin being up was even more reason to stay with his gamer.”

“He saw the strengths of the 440 with the forgiveness, the straightness – just needed to dial in the numbers a little bit.”

On the adjustments to the 440:

“We ended up doing a half degree less loft than the head we did last week, with a little more hot melt forward just to help reduce the launch and the spin. Tested it earlier today and last night and numbers were much improved. Spin rate was anywhere from 21[00] to 24[00] on good hits. The one or two misses he had were up around 27[00], nothing near 30[00]. Slightly faster than his gamer 425.

On why the 440 isn’t in play this week:

“I don’t think he’ll change this week due to the fact that there aren’t too many driver holes on this golf course. It’s tight, he wants to keep it flighted down. The 425 definitely flights just a touch lower.”

“If we get to a bigger golf course, something where he’s going to actually see the distance gain and understand he doesn’t have to steer it around, I think the 440 could be in play.”

On the center of gravity work on the new 440:

“With the extra spin he was getting, we knew we needed to go a little further and lighten the back weight a little bit, get that center of gravity moved just a touch forward to help reduce the spin. It’s something we’ve done with a lot of players, but in this case we had to go a little further. To both get the trajectory down, as well as the spin.”

On the visual differences between the two heads:

“The new one is slightly shallower with more of a rounded crown. The overall face is just a little less from top to bottom, which is an adjustment. Tee height is always unique for guys. For him he may feel like he may need to tee it a little lower just to achieve the look at address. Even at that level they get a little spooky about hitting one high off the face and launching too high.”

On Hovland’s spin preferences:

“He likes to live right around 23[00] 24[00] spin. Launch angle wise, maybe a touch low – he kind of lives in that 10 or 11 range. He definitely wants it to start left, but does not want to see it go left.”

On face angle and setup:

“You can’t look open for him. The club can’t be sitting open because then he feels like he has to increase that over-the-top move. We have the hosel sleeve on the flip side of the circle, which sets him up neutral and gets the lie angle where he needs to be.”

Hovland gets his RBC Heritage week underway on Thursday at 9.55 a.m E.T.