Me and my friends work with one like this since several years without problems or abrasion.
It comes with a illustrated manual and safety instructions for Triumphs
Works similar like the original "Churchill Tool" with a ball-head to allow the spring pan to cant while compressing the spring - without damaging any thread.
Four drills fix the compressor plate on the damper bolts to avoid any slipping.
Spindle is 8.8 quality (grade 5), yellow marked from the producer according DIN 975,
Holds 5.000 kg without deformation (elastic limit), 8 times more than the spring needs to be compressed.
Purchase price 69,00 Euro
National shipping in Germany 6.- Euro
International shipping to Great Britain, packets 16.- Euro
International shipping to the United States of America 37.- Euro