Good stuff ron,
what you have just said, took me a long time to realize, if I wanted the bigger roach.
I hope somebody can pick a bit of useful information out of my roach fishing days on the canal.
To start with, although it is classed as a still water, (land locked) there is plenty of movement, and at times too much. This is when my 8 foot winkle picker rod would come out, but I never had much luck on this method. It was always better to let a float drift over a baited area.
Although the surface layer of the water was moving from right to left, the bottom layer nearly always moved from left to right. Something to think about as the roach usually face into the flow, which would affect the direction in which I would strike into a fish. My float was always positioned to my left so I would be striking against the surface flow.
2lb mainline with a 12 inch 1.75 hook link and a size 20 or 18 hook, buried in a caster, which was my favourite bait fished over a bed of hemp seed. I would have a constant supply of casters on the go, depending on the time of year I would buy one or two pints of white maggots a week, and turn them myself, even taking them to work with me as I was very fussy as to how I wanted the finished product.
Once I had them to a light brown colour, I would then line a bait box with damp newspaper, put a piece of plastic bag over the box, then put the lid on. And put them in the fridge. The next morning they would be a really nice deep red colour and very crisp. At this stage they would go into a bucket of water ready for the evening session.
Shamefully, as what seemed like years, it suddenly dawned on me that the canal was full of match anglers all doing what I was doing and catching the same 8oz or a little more stamp roach.
As I said, the penny suddenly dropped that if I wanted better, I would have to do something different, and use other baits than caster.
One elderly chap used cheese, the triangular type that came in a round cardboard box. That is when I started to use size sixteen and fourteen hooks with cheese, bread, or single sweet corn. And that is when I started getting the bigger roach, not as many but deffinately bigger.