I looked at the frame data, and if I figured it out right on normal hit, it's a gatling with a two frame window to get it right, thanks to how long into kick you have to wait to gatling and such. It's like a very late cancel, not a link really but similar in how you time it.
Special combo for the day
cr.k (ch), cs.s xx pile bunker. Works well against waking up opponents since you have to be pretty close for this to work, pretty easy to rc and go into a nice fat combo. Just good to know its there.
Forgot to say this too, I found out two guaranteed two dhd setups off of ch c.hs, on sol just do st. hs, j.s(2-hit) xx dhd. On Axl, same thing except do jumping hs xx dhd. The timing will take a bit to get used to because you need to st.hs them at the right point (after they've falled a little) and you need to jump at them the right way, but it's pretty easy and gets you a big amount of damage. If you have full meter you can almost kill axl midscreen off of ch. cr.hs