I have read all the threads on this and printed all the pictures and tips for this DIY. Seems simple enough. One questions is when i take the spool valves off is it going to squirt out a lot of oil and all over the place? In other words is this going to be a messy job? I'm thinking a lot of towels. Any tips for me out there. I keep a pretty clean engine so I would like to hear input from everyone on this. thanks