i use solder from sears
i have one of those cold heat soldering irons, awesome tool, but i wouldnt suggest it to someone who isnt familiar with soldering already. the tip has 2 little prongs that must get electrically connected for it to turn on, and the tip is very brittle and if you have shaky/heavy hands then you will ruin the tips fast. for the longest time i used a 10 dollar iron from sears that suited me fine, although it ate tips like a mother. i only decided to get a cold heat iron when i started building pedals, as its much more convenient and i have alot more use for it now.
i think you should try throwing your compenents into the guitar to solder them, i always find it difficult to hold a part in place, hold the iron on it, keep the component/wire to be soldered in in place, and apply the solder at the same time. if its mounted in the guitar you can stick your wire in, let it sit, and then have the iron in one hand and solder in the other without anything moving around that youre working on. i do the same when i make pedals, i put allmy jacks/switches/pots in and then wire them up then i wire them to the circuit board.
whats the strawberry ice? is that like the black ice od that stewmac sells? just this morning i installed a makeshift black ice od in my sg by placing 2 schottky diodes from the volume pot to ground. i wired them up to a little on/on switch so i can switch between the normal capacitor on the tone control and then bypass that for the diodes. best of all, i got the diodes as free samples from central semiconductors and the switch free from e-switch as a sample. i love the internet