Zhenya, if Ilfotec HC is as much like HC-110 as I keep hearing it is, it's very definitely worth a try. You can dilute HC-110, and presumably Ilfotec HC, a lot more than the basic 1+31, and as you dilute, it changes from a generic developer with a lot in common with D-76 stock solution, to an acutance developer that gives a slight speed increase, to a strongly compensating developer by the time you get up 1+119 and cut your agitation from once a minute to every 3rd or 5th minute.
What you'll most likely find (still assuming it works like HC-110) is that you get a very small speed loss with most films at 1+31, usually about 1/3 stop, fine, very generic grain, and a very forgiving process. By the time you're up to 1+79, you'll be getting full speed or up to 1/3 stop speed gain, though your development times will have climbed some. I've never found a film for which HC-110 was a big mistake, and this is almost certainly true of Ilfotec HC as well.