Disassembling the marker isn't *horrible*, but it is something you'll want to take your time with and make sure you get it right. Since it sounds like this is your first time doing something like this, here's my personal suggestions:
- Get a cheap cloth or towel to work on. It doesn't have to be huge (say... 3x2'), preferably white or sand color. What really works well is a something like a bath towel (don't use your bath towels... your parents may kill you...), it's about the right size and just plush enough to work right. Paper towels won't work, they'll rip too easy.
- Work on the floor. Why? Because you can't drop anything lower. No tables to scuff and you should be working on the plush-ish towel you got.
- Get a good set of wrenches. If you don't have any, I highly suggest buying ball-ended allen wrenches, they help with any wierd angles but they're definitely not necessary.
- Make sure you have everything you need (extra lube, wrenches, etc). The less you have to get up to go get more tools, the faster and easier time you'll have.
Having said all that, you can download the manual for the Epiphany here: http://www.smartparts.com/Manuals/Epiphany.pdf
(You'll need a PDF reader, such as Adobe Acrobat Reader or FoxIt Reader to view it). Adjusting the dwell is covered on page 10 in the manual.
As for actually disassembling the marker, that's covered on page 14 of that same manual.
You'll also want to take a quick look at the best Epiphany upgrades
and Frequently Asked Questions