Bruce Weigle's site is back up at:
www.grandtacticalrules.com (http://www.grandtacticalrules.com)
Here, under Downloads, you can find free playsheets to convert 1859, 1864 and 1866 to the fast play system used in 1871. You can also download the 1871 playsheet, which will also convert 1870. However, each side of the four 2-sided playsheets must be downloaded separately. Furthermore they have been designed for US paper and need to be reduced to fit narrower A4 paper. I found a reduction from 100% to 97% was sufficient.
Thanks for the 'heads up' Andy :).
Excellent 👍