Hey guys Ive used my roller quite a bit and the axle spring in the switch is weak so I cant fire it without a REALLY hard press. I know its 4mm but I don't want to pay 20$ shipping for a spring. I live in Ct and was curious if anybody know a chain or place in US atleast to buy it. Its a simple spring at 4mm but the piece on the end is reduced to fit axle so that's whats throwing me as far as the size. Any input would be great thanks.