[Elecraft] Best approach for K1 rx alignment?

[Andy Engle]

Hey guys!  New Elecrafter here...building myself a K1 and having a LOT of fun.  Altogether, I'm assembling the K1 with 4-band filter, noise blanker, and tuner.
 
I've built a lot of smaller kits in the past, but this has been by far the most ambitious build yet.  I'm happy to say that studying all of the builders' guides and instructions have kept me from running off the road.  I do, however, have one question for the group.
 
Specifically, I have reached the point in construction (Ch. 7, Pg. 39) where I am to perform receiver alignment.  The instructions suggest, in preference order, a signal generator, another ham transceiver, or an antenna.  Since things have gone so well this far, I am motivated to use the best option and hopefully continue my success through this step.
 
I don't have a signal generator, per se.  I do, however, have a VE3DNL marker generator assembled and functioning.  Would this be appropriate to use for the intended purpose, or do I need a transmitter that is "natively" (that is, not through harmonics like the VE3DNL does) transmitting in-band?  Alternatively, would the Elecraft XG2 be a better tool for the job?
 
I am building for 40,30,20, & 15....but the XG2 is 3-band only?
 
Thanks to all for help and kindness to this newbie!
 
--Andy
K0ADE