right, so im replacing all the copper lines on the s2, doing away with the diagonal split, and fitting the car out with full braided brake lines

what im wondering is, for the rears, i will be running a single line to the rear seat area, and then a t-piece, and a line to each caliper.

but, on each of these lines to the rear calipers, can they be a single length, secured to the body up until the rear arm area, and then continued flexi to the caliper. or do i need to add a join in there, so the flexi section to the caliper is its own short run?

might sound silly, but just dont know if theres any rules and regs on this, and to be honest, doin it without a join would save me buying another 4 fittings, cos they aint bloody cheap!