Decided in-between showers that my test tank needed a rejig as HMS Nelson didn't quite fit., apart from diagonally and only if it was full to overflowing. So out with old and a short while later..... Thanks to one of our friends who had an old shower curtain which became an inner liner and a set of casters repurposed from the garage sort out earlier on. The end result is that I'm now able to move the tank as and when required plus the main objective has been reached, Nelson fits.