I don't understand why you would want two anchors rigged in the bow rollers. One, yes, so that you have one ready to let go in the event of an
emergency, but two would serve no useful purpose and just add weight out where it will do no particular good. If you choose to mount a Rockna as a primary anchor, that should serve for most all situations. Rather than keeping what appears to be a
Delta on the bow as well, I'd suggest an anchor suitable for different bottom conditions such as a
Fortress FX-23 or 37 that can be stored in the starboard anchore locker but be readied for deployment quickly if the Rockna or
Delta was unsuitable. (Frankly, for where you're located and likely to sail, at least initially,--say the Bahamas--the exisitng Delta and a
Fortress would be quite sufficient.)
Assuming your yacht is set up like most Moody 46's, the location of the
windlass on your port foredeck; and, the fact that your windlass utilizes an integral chainpipe, makes pulling a rode from your starboard bow roller problematic unless you have a capstan version of the typical windless. With a capstan, you would be able to haul in
rope rode, albeit with some difficulty.
Frankly, given you have chain on your port side, it might be best to have
rope rode with only a modest amount of chain--say 15 to 20 feet--on your starboard side. If so--and you lead your starboard rode through a chainstopper--you should have little difficulty recovering your rode by hand as you will only be dealing with modest weight, but you could also lead the rode to a spare
winch on your
mast or cabintop and simply use that rather than a windlass. While that may sound counter intuitive, remember that your windlass is not intended to pull the yacht up to you anchor, but simply to recover the rode as you
motor or sail up to your anchor. With a lot of chain that can be a chore by hand but no so rope rode. And, with a chain stopper, you can pull the chain up in lifts once you get to that. On our boat even my 5' tall, 105#, wife can recover our light weight anchor and rode with little difficulty (tho' I do not let her do so!)
Cheers,
s/v HyLyte