I built the KE4S Irons thru GW (48degree), and have the Maltby 52degree TP grind .90 sole wedge, and a Taylormade 60degree tour preferred .90 sole wedge.  I’m mid-sixties (age,not score!) 3rd year beginner, and my highly experienced buddy says I need a sand wedge.  I really enjoy building and playing the Maltby clubs, and I am beginning to see some improvement.  I have taken lessons, and the Pro didn’t mention a sand wedge. I do notice there aren’t a lot of SW options in the Maltby line.  Any opinions appreciated!