I’m on the same long path. I did Basic in Jan 2009, Apprentice and part of full in Jan 2010, then have not had time to get back to Florida or Mexico since. In the meantime, I’m keeping up my skill level as best I can above ground at the quarry where I do about 100 dives a year, doing "cave" skills on about half of my dives. Running a reel in the quarry is a good simulation for running it in a cave. I also try to do a lot of night dives to simulate as best I can the darkness of a cave. My favorite drill is to run some line around to be the "gold line", then take off my mask and close my eyes, do a couple helicopter turns, and then find the line with the "zero vis" of eyes closed and follow it to the "exit" blind. I also like to do this with a couple jumps in there to practice reeling in blind. If I can find a buddy to participate, I also occasionally will do some air share exits through some tight spaces, and such. Hope all this will help me retain enough skill to pass Full when I finally have the time and money to go finish up.