Hi guys I have been playing jazz style upright bass for a number of years and want to get into slap style. Could you answer some questions regarding slap: What synthetic strings hold their tuning well?---I believe Weedwackers are good for slap but do not hold their tuning to well--is this so? and your preference on strings? Do you mix & match makes & type of string? Do you use synthetic mixed with steel strings? Low or high action?---Height of strings from bottom of FB? Is the FB on a bass set up for slap more flatter than a conventional bass? Your expertise most welcome.