I'm currently outlining one of my stories to be. It's pretty lengthy already (It could easily qualify as a novella from the length of the outline alone). There are three volumes in total. The first volume is, more or less, fine. I have enough substance to keep it from getting completely stale. It's volume two and three that the events and plot points begin to strain. Volume one had twelve chapters in one part, with an average of seven chapters. Now I'm barely getting to four. I think the highest I had in volume three was six chapters. What's worse is that chapters in these last two volumes can even be combined and the action and pacing would fare better. If I did go through with that then I would eventually force myself in a corner as my ideas are being spread too thin. Any advice would be helpful.