I've been around the innorel RT90C at prs matches. Seemed to be a decent Tripod for the money. Twist locks will eventually go down, even on an RRS Tripod, it's just when it'll happen. The cheap tripods don't have as good of seals to keep dust/dirt out the leg sections as the higher end units. I run a couple leofoto tripods and have had good luck with them. Are you going to be using it for glassing only? Shooting and glassing? If shooting, I'd recommend something with 32mm or larger on the biggest tube, really helps with stability.