[r-t] Magic Block Doubles

[Philip Saddleton]

5 bells
touch=+3.1,"B1",
&5.3.5,"F1",
&1.5.2,"B2",
&5.3.2,"F2",
&1.34.2,"B3",
&25.3.34,"F3",
&1.3.23,"B4",
&2.23.34,"F4",
&1.5.2,"B2",
&5.3.5,"F1",
&1.3.2,"B1",
&5.23.5,"F5",
&1.34.23,"B5",
&5.23.5,"F5",
&1.3.2,"B1",
&5.3.34,"F6",
&4.5.23,"B6",
&5.3.2,"F2",
&4.5.23,"B6",
&2.3.5,"F7",
&4.3.23,"B7",
&2.3.5,"F7",
&4.5.23,"B6",
&5.23.34,"F8",
+1.3.2,"B1"

prove touch

Seven backworks and eight frontworks in a 120. How many methods?

-- 
Regards
Philip
http://myweb.tiscali.co.uk/saddleton/