I have a reason file (named 3 dreams) that a made in 2004 only with piano (NN-19) and mouse (without midi keyboard, because I didn´t have it at that time), then 6-7 years later (2000-2001) I added another piano in Combinator and pad in Malström and some sounds in NN-XT, Thor and Combinator and a random beat in dr.Rex.
Yesterday I opened the file and a made few changes (4-5hours) but nothing with the melody (I add only few instruments and a new arrangement), the melody is still made only with the mouse.
Thats why I called : Mechanic Dreams
P.S.
I have more melodies made back in the days (2003-2009) but I don´t like to route all cannals in the new mixer and then to check every single chanel if its allright (volume level, pan level - left,right, all fx...)...I need to find more motivation for all those old melodies (more than 500 reason projects)