Hi peeps

I've been enjoying the delights of my NC23 Tri Arm for a couple of months now

I've been considering fitting some crash bobbins

Where would the following items fit

http://www.ebay.co.uk/itm/270490000960? ... 1438.l2649
Also are these worth considering

http://www.ebay.co.uk/itm/200688676847? ... 1436.l2649
Any help/suggestions would be appreciated

Em
