I am considering adding some 'standards' to my shop. I am interested in the ability to calibrate DMM's, using my Agilent Calibrated 3458A as a 'transfer standard'. I have a Fluke 731B 10 VDC standard, a Fluke 335A DC Voltage Standard that goes to 1000 VDC, and some selected standard resistors from 0.1 ohm to 10 KOhm in decade steps. I also have an EDC CR103 DC Voltage and Current Standard that goes to 11.11110 VDC and 111.1110 mA. In order to complete this 'lab', I would need an AC Voltage Standard and an AC Current Standard. What suggestions would there be to address this? I have thought about a Fluke 5100B as well as a 5450A Resistance Standard, and 5400A AC Voltage Standard. If I use my 3458A as the 'transfer standard', I can use it to provide the additional 'digits' beyond the 5100B. I also have some LCR meters but I don't have any capacitance or inductance standards. Once I have this sorted out, I could 'off load' my earlier, redundant, equipment. I would appreciate any and all thoughts about what to add to my 'lab'. Thanks in advance. Joe