Thought I'd zombie this thread for two reasons... One, these are legitimately inexpensive now compared to 2012, when they were still fairly pricy, and two, well, I just got round to actually getting some, so now I have something to say about them, ha ha...
Both saddles cost me $99 a pop. I picked up a new Flite Monolink Flow on Craigslist, and a non-cutout Flite Monolink from Cambria Bikes. For proper retailers, Cambria represents the cheapest I've seen the regular Flite Monolink stateside, and an outfit called Bikeman in Maine sells the Flow version cheapest, at around $122. I've seen the Flite Monolink Flow combo set (with the alloy seatpost) for $143.75 from Pro Bike Kit USA.
For a seatpost I'm using a Ritchey Superlogic Link Flexlogic. It comes with the standard Link reversible two-bolt clamp, but Ritchey also sells a Selle Italia Monolink clamp for $19.95. Unlike the Selle Italia post which apparently gave Sam (post above) some issues, I didn't find micro-adjustments difficult at all. The Ritchey clamp is a 3-bolt, triangular design, with the bolts running horizontally, from side to side. The bottom two bolts keep the clamp on the post's curved top which features a "lip" the clamp grips. The top bolt clamps the Monolink rail. You adjust the saddle's setback and angle while the clamp is loose, just barely tightened. When you've found the correct position, you pinch the clamp together with one hand and tighten the bolts down. There was no inadvertent changing of the desired saddle angle while tightening, which can happen with some clamps.
After mounting both up, I noticed immediately how much more flexible the Flow version is. It conforms much more under weight than the non-Flow. For me, this is not a good thing... One of the things I like about the newer Flite design is the 145mm width, and under rider weight, the Flow version seems to deform into a much narrower saddle... It felt just a bit wider than my 131mm SLR (standard rails). Worth noting, I'm not particularly heavy... And while I certainly felt this deforming and narrowing of the saddle when I was on the bike, I was able to actually see this by crouching behind the bike and pressing down firmly on the saddle wings... It doesn't take a lot of weight to deform. The wings go down, the middle goes up, and voila, you have maybe a 133mm saddle with a domed top. The non-flow version shows some flex too, but no where near the same amount. It's about standard for a saddle with a carbon composite shell. The top remains fairly flat when weight is applied. Worth noting that coming off a 100% carbon shelled S-Works Toupe, most saddles feel pretty flexy to me.
Both saddles came in under their claimed weights, with the Flow weighing 179g (vs 180g claimed) and the non-Flow at 182g (vs 185g claimed). Although the Flite Monolink weighs some 22g more than the old S-Works Toupe it's replacing, the Ritchey Monolink clamp is 14g lighter than the standard Link reversible two-bolt clamp, making the total difference between post with S-Works Toupe and post with Monolink Flite just 8g.
Because of the deforming issues, I'm not going to ride the Flite Monolink Flow. For me, there's no point... I know what saddle widths and shapes work for me lately, and 133mm or so with a domed top does not. Once I have some miles on the regular Monolink Flite, I'll post a ride report.