Inventory and Bins

hello all. i searched the forum for a little background information, but did not see much regarding my scenario.

We recently purchased a third party warehouse mgmt application to handle our inventory/distribution etc. We are running 3.7b codebase with 5.0 client on a SQL backend.

the situation:
our WMS controls inventory and interfaces via flatfile to our NAV. We are using warehouse shipments/receipts as the touchpoints for incoming/outgoing stock and using item journals to handle inventory adjustments, cycle counts, etc..

So, a CSR would create an order to ship from our WMS Location and release the order. Order controller would put that order on a warehouse shipment and release the shipment. A text file would be sent to the WMS which will read the file in and process the order. Upon shipment, it will return a text file to navision. a dataport reads the file in and builds package records in NAV custom table. a process will run to post shipment lines that have been packed (and the inventory should be decreased). a PO would work the same way, just adding stock to NAV in the end. Inventory adjustments similarly are interfaced from WMS to NAV, creating positive/negative adjustments as necessary.

my question:
In our WMS system, inventory is carried within a Warehouse, and stock within that warehouse can have different status (available, quality,Return). The status determines if the stock can be allocated to picks. In the original integration i did for this, i created Locations in NAV and did some translational work in the interface, using the reclass. journal to move stock in NAV to an appropriate location based on the status of the inventory in the WMS system.

so, if the stock was available, NAV would show that inventory in Location 1. If the stock was quality, it would be in NAV location 2. I am leaving-out a fair amount of customization to make this easily configurable in NAV - it was not hardcoded. this gave us visibility to what was available (could allocate) versus what was not, allowing sales to be able to say with some certainty if stock could ship when dealing with customers.

Now we realize that the multiple locations to approximate the multiple status is not an effective solution. It does not play well with the Req. Worksheet being the biggest stumbling block.

So, now we are considering the use of Bins instead of locations. We would therefore have 1 Location in NAV with 3 bins: available, quality, return. I require shipping and receiving from my location in NAV but i do not require Pick/putaway (that work is done in the WMS system). i cannot require the CSR to enter which Bins they want to sell out of, or a buyer which bin they want to buy into - this should be defaulted to Available. are there any pitfalls to using a location with bins in this manner? I cannot require any "warehouse" work in NAV beyond what i describe above, since all the real warehouse work is being done in the other system and avoidable double-work is a no-no.

does this fall in line with the use of Bins in NAV?