[Elecraft] K3 build: seeking advice re: KRX4 and DVR

[DOUGLAS ZWIEBEL]

HI all...

I am helping a neighbor assemble his K3.  I have put a number of these
together now, but none with the DVR and/or subRX.

I think the DVR can go in with the initial build (comments)?

Do you suggest that the "base" K3 be completed first and then the
subRX be installed, or should I do it "all at once?"  Maybe the
official K3 advice is "in the box."  It just arrived at my qth tonight
and all we did so far was an inventory.

Thanks!
de Doug KR2Q