hey guys. I dont know enough about this stuff to make even a somewhat informed decision on my own, so I'd really value your input. http://www.kahlerparts.com/Other_Pages/Model_Specs.htm ^ I have no idea which one of these would be the best. I have a Peavey Millenium series 4 string (just a $300 bass I use for band duty) but I'd like to throw in a Tremolo (all the while knowing the tremolo will cost more then the bass did). But I was wondering which one of those would be the best, in terms of the least amount of modification to the body itself. I'd prefer to stay away from a heck of a lot of routing to the back side as what you'd find on any electric guitar, as in a stratocaster. I wont be doing the work myself, so I'm just trying to keep the costs down). Are there any tremolos that dont require all that extensive modification to install? If so, what would be the best bet for the best usability VS. cost/install in your opnion? Thanks a lot for reading this, and thanks in advance for your help.