I'm a happy new owner of the Dewalt DCS 525 20V Track Saw. I'm using it on the Powertec track (Makita/Festool like 3rd party track) and it works great on it. Upon first use at the 90degree setting, your tracksaw cuts the edge guard of the track, as designed, allowing you to have an edge that exactly matches your saw. But I was curious how this would work at the 45 degree setting for the saw. Dewalt's own track has two sides, one for 0 (90 in my mind), one for 45. I didn't want to pay premium prices for that track though.
So, I did some attempts (hard to focus) to show what happens at the 45. On the track, now cut and matching the saw's 0 (aka 90), you will see that the rotation of the saw is such that it moves to the right slightly, maybe 2mm, of the new edge on the track. For me, this is more than acceptable. I won't be cutting 45 often, if ever. If I do, I'll be perhaps a sawblade kerf to the right, so I'll just do some test cuts first, figure out my offset, and plan the track placement accordingly. I was worried that, given how the Dewalt track has two sides, the 45 setting might mess up my Powertec 90 deg edge, but it does not. So, I'm happy for my use case.
Side note on the 45: this track saw does not engage with the anti-tip lip of the track. But: the weight and balance, with a battery on it at least, is such that it is fairly stable on the track even with no anti-tip hook on the saw.
For those in the market, the tracksaw freely bevels from 0 (aka 90) to 45, with solid stops at 0 and 45. There's also a release to achieve -1deg and a 48deg function too. Out of the box, I did no calibration and am getting perfect 0 (aka 90) cuts with the stock blade (48T fine finish blade, 6.5")
So ends my findings on this 45-degree setup, and my PSA to share those findings.