30mm spool holder for makerbot replicator 2 and 2x

i've bought some PLA spool that have a 30mm hole, they simply doesn't fit in the spool holder the hole is too small and also the rod of the original pieces is too short.
so i've drawn a new spool holdet that fit perfectly in the replicator 2 and 2x, it is also inspired to the original design with some minor improvements to make it a little more durable.

hope this help!