Hi Dsa,
If I remember correctly, the standard Rega mount uses a 222 mm pivot to spindle distance to achieve a Stevenson alignment with a 237 mm effective length (along with some unknown to me offset angle).
The Model-2, with it's 239.3 mm effective length yields a pivot to spindle distance of 222 mm to achieve a Baerwaald alignment.
The only potential problem you'll have is if my memory has faded and your pivot to spindle distance deviates by more than about 2 mm (e.g. less than 220 mm or greater then 224 mm).
Get out your metric ruler and measure it.
Let's assume a worst case scenario - the center point of the mounting hole coupled with its diameter will not quite permit achieving a 222 mm pivot to spindle distance for your Model-2.
You certainly won't be off by much, and if you encounter this problem, you're still not out of luck. You can buy back the mm or two that you're short by grinding / filing the hole a bit.
As an aside, the current Model-2's come with a mounting collar that uses a single bolt, like that of the DPS. It is mounted near one edge of the collar so that you can rotate the entire tonearm along this eccentric point to effect both fine and gross changes to pivot to spindle distance. Of course, as I mentioned above this movement is limited by the amount of clearance between the arm stub and the larger Rega mounting hole.
I suspect your height question is twofold - being able to achieve correct VTA as well as clearance from any dust cover.
From a VTA adjustment perspective, know that the Rega is one of, if not the most limted arms on the market. You will be able to achieve a correct VTA adjustment with a Model-2.
Unfortunately, I have neither measurements handy nor a Model-2 on hand, but my memory tells me that it is of average height from a dust cover clearance perspective. DPS turntables are fairly short and have no dust cover clearance issues with Model-2's and DPS's.
The photo on my Schroeder page (
http://www.galibierdesign.com/prd_schroeder.html) shows the Model-2 standing quite tall (adjusted to maximum height), but view any dust cover clearance issues from the perspective of how much above the center line of the arm wand, the top of the bearing tower is. It's not that much.
Also note that this Model-2 photo shows an older mounting collar with three mounting bolts. Scroll to the DPS photos where you'll see the eccentric, single bolt mount which is also currently supplied with Model-2's.
Compatibility with a high-ish compliance cartridge will be a crap shoot. The Model-2 (both carbon fiber and pertinax) has an effective mass of 12 gms. If memory serves me, the Rega is in the 10.5 range. Sometimes, 1.5 grams can be inconsequential, while other times it can tip you over the threshold.
Cheers,
Thom @ Galibier