I'd stay away from the delta mics if i were you there cheap - for a reason there massively heavy and i think a few peeps had issues with the actual bolts that come with them, If i were you i'd be looking at alloy Fk's or H&R spacers there a lot more expensive but are alloy not steel so dont weigh a great deal, i think the delta mics are around 5kgs not sure if thats both or not, but as its rotating mass its X4 (i think) So thats a lot of extra weightcheers mate ill look on ebay
j