NP. The only way to really practice this is in real matches - you can set the dummy to record tick throw set-ups, but it’s honestly easy enough to practice IRL. The next time you’re playing, just let your opponent launch an offense and work on timing the techs. That’s what casuals are for :).
You can, however, practice the improved input (the c.jab crouch-tech) in training mode by just turning on input display. If the input readout looks like
Then you did it right. If it looks different, you’re doing it wrong.
In my experience, everyone has a different way of explaining the timing for option select-teching. I think the best way to explain it is this: imagine that your opponent is going to throw you at every possible opportunity in his block string. You want to time your techs for a slightly late throw escape from all his ticks. You are inputting the escape pretty much in rhythm with his block string, but a few frames after his moves hit (that’s when the throw would be coming). So it’s like
Ryu jumps in at you, you block high for the jump-in. He might just empty jump-throw you, and since he’s airborne, crouch-teching isn’t smart, so I recommend just learning to block empty jump-throw on reaction. Of course, his other option is a jump-in. You block his jump-in high, then imagine he’s going to throw you right afterward, time your crouch-tech for a late throw escape. If he continues the block string with c.lp, once again, imagine he’s going to throw you afterward, and late-tech it. Then repeat.
I do want to stress that high level players will figure out when you are crouch-teching during block strings and take advantage of it. This technique is extremely useful, but is not 100% safe. There are creative ways of beating crouch-teching by taking advantage of the whiffed crouching light attack. Ryu can throw out a delayed EX-Tatsu, for example, or simply psychic-DP that shit. However, against players that don’t really know about this tactic, this can increase your throw defense to 90-95%. Once you’ve mastered crouch-teching during block strings, the only throws you really have to worry about are meaty ones.
Also, you can’t rely on the crouch-tech against the following: Rufus (his instant dive kick will sometimes get stuffed by c.jab, if he does it late, but will beat it if he does it a bit early), Cammy (same reason, but she’s not really as scary as Rufus)
Edit: After a bunch of testing, it seems like the c.jab crouch tech is fairly safe against Cammy’s instant air Strikes. c.jab stuffs it pretty much 100% of the time.
And you should almost never crouch-tech against: E. Honda (he’s a lot more likely to tick into scoop then a regular throw, so just be wary - back dash and neutral jump all day, though), Abel (again, command grabs), Zangief (just hold up-back and hope for the best - this is the one character I would say you should absolutely never crouch-tech against). Basically, it won’t escape command-grabs, and most command grabs will eat up your c.jab, so keep that in mind