First, I want to applaud you for having this "moral dilemma" because it shows your deep appreciation for the helping hands dealt you and your love of the ukulele as an instrument for expression of your musical talent.
I think we all tend to attach sentiment to objects when, in fact, it is more about the feelings we got from using that object, from the joy we received (and gave) by using that object. I loved my first car, an old easy chair I bought at a flea market, a pair of shoes my mom gave me when she had nothing more to give.....but when I got much older LOL- I realized that it wasn't the "things" I loved but the memory of the feelings I had when I drove, sat in or wore those "things". Nothing can ever take that from me so when it was time to let these things go (because my preferences/needs had changed) well their was no guilt or shame. In fact it was a joy because I knew they were passed on to people who created loving memories of their own. And quite honestly I doubt that any of the folks instrumental in helping get or receive these items felt anything less for me having moved on. Almost all of us have found that our first instruments may not have been the best fit for us in terms of size, tone or appearance. It's a continual learning process.
Remember Kyle, you brought a lot of joy to people with that Koaloha- me for one throughout videos. You can continue to give that joy regardless of the instrument you use to deliver it. And the Koaloha can move onto someone else who will experience what you did when you first started out....and so the cycle goes. And you can reignite your passion for music playing with another uke that better fits your current needs.
I'm reminded about a recent forum discussion about a truly unique uke gifted by Wickedwahine (apologies for butchering her forum name).....passing that instrument on was the gift that kept on giving as it resulted in several folks making a dream uke possible for several others. I myself was helped out incredibly by a forum member (DownUpDave) to get a Loprinzi soprano that I know was hard for him to let go but I do know he felt good that it went to someone who loves it and plays it daily. Will I someday trade up to another uke- perhaps...and then the Loprinzi may move on to another player and I don't think Dave would feel any animosity -
.
Not everyone has the financial means to "gift" things - there is no shame in that or selling something to buy something similar but different. You might even find a forum member who wants to trade with you - double win.
All this to say....go ahead young man, trade/sell and buy for whatever best suits you "now"- without shame, guilt or remorse. You've done the Koaloha proud and nothing can take away the memories you have of that uke- the "stories" are still yours (you don't need the object in hand). Feed your musical creativity as that, I feel, is more precious.