UM mini bushing (XY) block - experimental

Try to make small and simple bushing (XY) block for UM (elektronik.si).
For now just one variant of block.

Update 8.jan. 2014
Upload new files.
"Block_a_01a" is same as "block_a_01" except thickness (see drawings).
"Block_c_01a" is replacement for "block_c_01". (for the use of a block_c_01a is to be added washers - see drawings).

For printer you need:
2x "bolck_a_01" or "block_01a"
1x "block_a_02"
1x "block_a_03"
4x "block_b_01
8x "block_c_01" or "block_c_01