I have 4 of the V3 MONO, 1 ZA3, 3 TB10D and YES, all get slightly more than WARM when running at 48VDC but my solution may not be pretty but it is SIMPLE, and WORKS.
I ordered many ALUMINUM heat sinks of various sizes and on the 3 TB10D they are on the TOP of all 3 units with 3 FANS blowing on...