Good luck with your Rex. Setting one is probably quite close to the AS-D2.Fascinating discussion guys. So here's the deal, I bought the Feather AS-D2, its an excellent razor for the price, an absolute tank! I also love the textured grip handle, easy to hold in the hand, and the weight of the razor, does all the work carrying the blade through the cut. You don't have to use any pressure, but because its a unique design, you have to use a weird angle of 50 degrees, and ride the cap. Its cast and or injection molded out of solid stainless steel, so durability is high, no chrome plating to chip away.
Having said all that, it is an extremely mild razor. Those who have reported themselves as baby faces, with very light soft hair on only parts of their face, the AS-D2 will provide the follicle weight reduction that you require. But keep in mind, even though its a mild razor, it can, and will knick you in the moostash area going ATG, if you are not careful, same goes for chin too. I discovered this the hard way guys, trust me, its a thing.
I find what works best, is working on the area a little bit, then immediately applying more soap lather to the spot, and going over it again. This keeps the skin slick enough, to allow the razor to do the job, without knicking you real bad. Part of how we knick ourselves with the AS-D2 however, is because were going over the spot numerous times, know why? Cause the razor is exceptionally mild! So, a razor that is supposed to keep you away from trouble, gets you into it faster then you can get out of it.
But guess what? I don't have a baby face, I don't have thin soft sparse hair growth. I have thick course wiry hair, yes the kind who's stubble could polish a rock! And this is why, even as much as I love my Feather AS-D2 razor, I have to stop using it for my 2-days shaves. I needed something that could handle course thick hair and 2-day stubble, and do it quickly, and efficiently. So, with that said, I decided to upgrade to an adjustable razor.
I ordered a Rex Ambassador, should get here next month. Its a razor that is supposed to handle large amounts of hair growth, and its supposed to handle course thick hair. My plan currently, is to set it to setting 4, try it out for the WTG pass on 2-day stubble. What I am looking for, is the razor to effectively remove all the bulk in hopefully single passes if that is possible. Then on the 2nd pass, I am going to come back on a ATG pass with the razor set to setting 1, for the final finishing and buffing.
Why am I no longer making XTG passes you might ask? Well, every single time I tried that with my Feather, for a total of a 3 pass shave, I'd knick my neck, cause extra irritation, bleeding. I just have one of those kind of faces and necks that just say, oh please god no. I find, I get plenty good enough shave with my Feather, with just a two pass shave. I expect no less of a higher end adjustable such as the Rex Ambassador, but I will have to see.
As with everything in life, YYMV.
This razor can be a little picky on blade choice. Perma-sharp and Astra SP works well for me.
Setting 4 is a really efficient setting.