There's two "synths" in "Garden": the aforementioned distorted drum sound (IDK if that counts as a synth or not) and Synth Bass 101. The "synth" in "Exponentiation" is actually a Tuba from Kontakt's Factory Library (in the orchestral section), but it does kinda sound like a synth now that you mention it. The modifications to Dream Bell was mostly me toning down Sytrus' built in effects and modifying the filters a bit.
Also, my advice is that you don't have to replicate 100% of my particular plugins to get something that sounds like what I have. (This applies especially for Kontakt Factory Library, which is good but costs a bit of money.)
And thanks for the compliment!