I need to change the radiator in my hall, but the pipes come up vertically from a concrete floor, which gives me less leeway over width. The two pipe centres are exactly 103cm apart. It's difficult to search for a suitable radiator, and when I get in the ball park, I don't know if I'm getting pipe centre measurements or the width of the panel. Most retailers, and manufacturers don't provide proper/any tech specs, so I'm just confused. Neither Screwfix, nor the competition are much use on this. Is there an easy way of finding the width I want? And, should I go a fair bit narrower, and alter the copper pipes (I'd have to use ring solder fittings)? Or get as close as possible and use different tails? In which case, can I shorten rigid radiator tails, if needed? And, are telescopic tails any good? Thanks in advance.