unix-guy
Master of RTFM
See my previous post re: whether the physical switch is latching or momentary.I've found it easiest to always use external switches for things that work with momentary commands, like engaging increased depth and rate of a modulation just while the switch is held down, or for increasing or decreasing a preset etc.
When you get into latching and changing presets it was also difficult to know the given state of the assignment, and also if that reflects the state of the switch itself, even if you have ones that can have a status LED. Always created a bit more confusion than benefit for me using them with the MFC
Being able to have them do a preset change, scene change, etc though is really useful and I think can expand the FC6 potential a great deal. However, unless you build your own, the cost of buying 4 external switches, all housed together with dual jacks, each on their own etc, can add a fair bit of cost, and still does take up some space, so your maybe not 'saving' all that much buying a $500 FC6 and then $100 in switches and TRS cable, to add 4 buttons, over just paying $700 and getting a FC12 which would give you 12 switches, and that would have a bit more flexibility too.
Really tough call as the FC6 is really powerful for its size, and changing a layout to access banks, presets etc really isn't too difficult and opens it up so much.... but, at the same time, would I grow annoying with having to do the dual switch press, enter layout mode, switch to my preset layout, select one, then go back into the layout mode, select my scene 1-6 layout, and jam with that.. ?
Also, many people already own external switches, so no additional cost... BUT if you don't, I would agree - buy the FC-12.