Hey guys!
Thanks so much for the quick replies as well as the advice you've all given me.
I ended up having a chat with an engineer from Curt earlier this morning and he confirmed that whatever hitch extender you buy will automatically cut your GTW and TW by about half no matter the rating of the extender itself, He continued to explain that since you've now altered the geometry of the towing configuration, you need to take the lesser of the 2 values between the 50% reduction of the vehicle's GTW and TW capacities and the extender's ratings.
I am definitely going to take this opportunity to voice my concerns to the Sales Manager along with the owner so that they clearly understand where I'm coming from. Let's then see what they'd be willing to do in order to take away the bad taste this experience has left me with.
Thanks again, guys! Your advice and feedback has been greatly appreciated!!
Riz