Yeah sure Chris,
Your preston olivettes are described as inline although not in the description and the picture representing them is of the hollow tubing insert variety which most bolo and heavy pole float users prefer as they can be changed slipped off the line without having to dismantle the rig.
I also asked one lad, who recommended your preston silicon for stick float use, which they were nowhere near the correct diameters, luckily I had some spare but spent around £10 on silicons I have tonnes of.
Everything else was fine :)