hard landings
I don't know, I've made several bad landings myself. after 18 years I hit a gopher hole with the right main and busted the gear attachment point.
The g-meter said 5 g's. So, I would guess as long as the gear still keeps springing, and the g-meter dosen't reach 5, I would say that your ok.
That being said, however I would check your attachment points for your mount, as make sure that they are not cracked, (this was the result of the gopher hole incident). You probably do this at annual time anyway, I know I do.
I don't think you have anything to worry about.
Van has designed some pretty tough little planes, as long as nothing is bent, fly on! Or, if your really concerned, remove the mount and have it magna fluxed, or x-rayed.
Just a side note: I have since found that if I land the tail wheel first, about one second later the mains will touch, with very little or no bouce at all. (however, your results may vary)
My $.02