I wanted to craft uranium-235 blocks with NC's uranium for using them in the cutting machine, but there doesn't seem to be a recipe. I could use an extruder/alloy smelter/fluid solidifier, but that's an extra step that I can skip with literally all of the other blocks. I tried using a compactor drawer (and another one with the conversion drawer upgrade) to no avail.

Having looked into this, it doesn't seem like NC even has a U235 block.

It would add exploit venues if we permit conversion to the GTCE one with a custom compacting drawer recipe. I don't think there's a good fix for this right now.