In article ,
Lobster wrote:

If it's allowed, then I must admit I'd overlooked Andy's point
that my crimping tool will be too small; so I'd probably end up
usig Chip's solution with an earth block instead.

Years ago the approved way of jointing two thick
wires was to hold them parallel and tightly wind
onto them a 'spring' of about 26swg tinned copper
wire. Then solder together. The spring provided
the mechanical strength, and avoided the need to
twist (and possibly weaken) the thick wires.
Tidier for sleeving as well.

--
Tony Williams.