FYI, parakeet seed does not have the nutrition for a parrotlet. I know they are the same size, but parrotlets have the nutritional needs of a larger parrot. Cockatiel/conure seed blends are more appropriate.
Sorry but actually have to disagree on this.
Wast majority, if not all Cocatiel/Conure type of seed mixes are full of peanuts, lots and lots of corn,dried fruit, sun flowers seeds, pumpkin seeds..
That's lot of oils, fats, sugars, starches etc.
While all this is lovely from time to time for our little friends, in a form if a treat. If you will be serving these as a daily mix, your parrotlet will simply not know when it's enough, and you know how much they love stuff like sun flower seeds and nuts.
We are buying a quality parakeet seed mix for Kiki and he loves it. Only have to separate the sun flower seeds, which we then use as 2-3 a day treat.
The seed mix is daily mixed with added quality pellets. And all the fat rich stuff is offered as an ocassional treat. We don't really give him dried fruit, as this will be def full of some preservatives. Instead we offer a tiny bit of fresh fruit daily as we also both love fruits. Kiki will eat anything from bananas to lemons. He loves oranges and mandarins the most though.
P.S. I know you are def more experienced and established parrotlet owner than me, Rubydoo. And I do respect that.
So just realised that explaining all that to you sounds bit silly. That being said, based on my own research that's what my findings are. Also, we now shop for Kiki in a not too far away huuuge Aviary shop, the best variety of stuff I have ever seen. And one of the ladies there is super knowledgeable and gives straight forward answers every time. So last time we went to stock up on seed mix for Kiki, we actually had in our hands from the same brand, but the two different above mentioned seed mixes and just wanted to confirm with her. Without hesitation she pointed out the parakeet seed mix as a better choice for parrotlets.