I can't stand either toggles or hook and eye clasp systems - both come undone on me, whether necklace or bracelet. I may be an outlier though since my daily life is pretty active and outdoorsy.
Thank you, Pattye and Charlotta! Yes, the larger pearls are some low quality Tahitian's I purchased about 15 years ago and forgot about. They ended up being perfect for experimenting with :)