Some intersting points.
My particular concern was not what its called, GUMPS BUMP or whatever, but that the standard mnemonic used appears to be a non-structured approach. Thus the flow method, advocated by some, would suggest more structure - however, as mentioned, an odd cockpit layout might frustrate that.
Sir Pratt, I take your point, and the order can be changed, with the airframe checks moved to the start of the checks - no problem.
As to using whatever system you want - well, that's OK when you are own your own. But, with instructor or exmainer who is expecting a *standard* BUMPF... or whatever, its do it his/her way, not your own way. In other words having to memorise a disorganised, but standard, sequence, for the sake of it.
GB