I get the mega spool 60/40 rosin core from Radio Shack.
Bill: you'd be suprised how the 908 handle isn't that 'large' you might want to look at one ,if you haven't, before you buy both.
tinning before and after every solder is one key..another is when you are done soldering add solder to the every part of the tip and let it sit on each part until it doesn't bubble anymore, then wipe tip tin and move to another part till the whole tip doesn't bubble. Then turn iron off and keep adding a bubble of solder to the tip until is too cool. The nice bubble will protect the tip and come right off next time all clean and shiny.