I just checked and the difficulty settings for all the rom sets are set to NORMAL by default. I think that when rom set 4 appeared, all the others were shifted down a set to make room so that the latest is now set 1. Unfortunately the NORMAL difficulty setting for the latest rom set is easier than NORMAL difficulty the others it appears :(.(posted 8895 days ago)So to make set 1 the same difficulty as the others timewise you would have to press F2, change the difficulty to HARD, press F2 to get back into the game and then escape and save the marble.nv file which must be restored each time a recording or playback is made. Seems a bit of a faff.