Agree, everyone will be a little different with their needs and what works best for them. I primarily do short course but this set up seems to work for me when I do a long course event on my P5:
.....Profile Design HC up front.....the bottle sits between the arms using velcro on bottle and extensions....no holder needed. Garmin computer sits on top of the bottle filler cap using velcro and small screw.
.....Xlab bento to hold gels
.....Xlab carbon 400i double wing bottle holder behind the seat....use one side for regular bottle and a Xlab Mezzo Pod for repair kit. The Pod holds two tubes, two CO2 cartridges, lever, and a couple #4 and 5 wrenches.
Have used Conti gp4000s last few years but switched to TTs this year on my Enve 8.9s.
Good luck and have fun.
.....Profile Design HC up front.....the bottle sits between the arms using velcro on bottle and extensions....no holder needed. Garmin computer sits on top of the bottle filler cap using velcro and small screw.
.....Xlab bento to hold gels
.....Xlab carbon 400i double wing bottle holder behind the seat....use one side for regular bottle and a Xlab Mezzo Pod for repair kit. The Pod holds two tubes, two CO2 cartridges, lever, and a couple #4 and 5 wrenches.
Have used Conti gp4000s last few years but switched to TTs this year on my Enve 8.9s.
Good luck and have fun.