The only form of marker float I use is my fishspy. ( yes I know you don't like it yonny) but, it's not been out for a while. But it has it's place in my arsenal.
I'm with you elmo, bait out in the general area, I feel is less likely to spook or warn fish, that there is a trap waiting for them. Saying that, I know some guys do very well with kilos dumped out of their Bait boat. Although you'd be surprised how much the bait spreads out on the way down (underwater footage) even the tightest spombing will spread out quite a bit. I suppose it's down to personal preference/confidence .
I'm confident in a good spread, generally put out by hand or with my catapult. 7-9 freebies in a pva stocking on the hook.