Those N to sma bulkhead items are $10 each on the link you gaveand the N end has 4 leaves for the central connector. Even allowing for two effectively in series, your results seem poor. Admittedly I did not do a challenging test on my repaired sma connector as I have nothing with me to test (away from home) other than the coax loop with the kit.
Nevertheless I am looking forward to getting my 4¡± screen v2 in a metal case with N connectors.
