Hi Tim
go for the buy you will always need anchors somewere, as regards resin in the tubes that you fit in a gun the art of using it all and lasting longer palce the tube in a bucket of very hot water this makes the 2 components very wet and the mix faster at the nozzle and you can run the tube before it gets chance to go stiff, i have a shed load of hilti sausages from 12mm up to 20mm but these push in the holes and the threaded bar is spun into it witha drill which creates the mixing and the heat from the rotation also makes it go off quicker,the latter is used for securing plates with nuts and washers you can make steel plates folded for 30 degrees with 2 holes, the flat part secured to the bolt the folded outer hole takes the karabiner.
mick