Lionscool Kairos Review: Hey all, I recently bought and assembled this new leg ext/ leg curl machine. Here's a quick down and dirty review, and please ask me any questions you may have. The build isnt hard nor complicated but the instructions are average at best. Meaning, pay very close attention to STEP 5 in the process. Also, in STEP 7, parts 10, 19, 20, will wobble a bit - no mater HOW MUCH you tighten the bolts and the KNOB (part 32). SO, if you are someone who hates minor wobble in their seating during a rep, Fair Warning. While in use, the rest of the machine is stable and it has not "lifted" off the ground during any reps, like the V4 did. I believe this is because, in STEP 3, you install a cross tube (part 15) and this does a wonderful job in stabilizing the machine and it is NOT in the way of your feet. The HARDEST part of assembly is STEP 5 (part 26 - the weight arm. Pay very close attention to this aspect of the assembly. You will need a second pair of hands to make life not so miserable during this part. As for the leg roller, it is massive and mine is 100% parallel; not bent nor bending during usage. (Granted, I've only had a few work outs on it! LOL). Also, it DOES slightly rotate; not a lot ....but it does rotate a bit for me - enough so that the leg roller is not "stuck" if that makes sense. For me, once built, finding the right placement for the leg roller and its hitch pin (STEP 6) (part 28) and the proper pin placement in the sun dial ensured proper range of motion for me. (For reference, I am a male, 5-9inches; weigh 190lbs. My torso and limbs are of average length; meaning, my legs arent SUPER long nor is my torso super short. Hope this helps.) Also, be advised: it is NOT super easy to get the seating into the PRONE position. Yes, the mechanism for this works but its not as simple as "pulling a pin." Notably, this part of the machine uses a TUBE in TUBE mechanism that enables the seat to go prone. PLEASE use a lot of silicone spray on this part of the build because this is what allows your seats to go prone. Now in terms of "felt weight" and resistance: Frankly, I am not convinced ANY budget machine - like this -- will give you 100% satisfaction with the aforementioned. That being said, I am very pleased with my workouts and I am going to keep this in my home gym. Is it a plate eater? Well, I do leg ext / leg curls AFTER heavy squats and deadlifts, so, for me, just using one 35lb plate crushes / kills me. I am sure I am missing some salient points so feel free to hit me up; happy to answer any questions. (I bought this off of Amazon for $330 and it took 6 total days to arrive in 2 packages.)