New and custom content here: https://aicollective.ghost.io/
Slider for adjusting age, not quite happy with this one with Pony as it does not seem as flexible as i would want. It does work though.
I have found that it works pretty good on SDXL Checkpoints, but sliders go from around -10 to 5
Strength from -2 to 3 is the sweetspot in my testing, under -2 it just gets distorted. And after 3 it starts looking like dolls.