Honestly, $200 for a paint shaker is kinda in that weird zone where you're paying more for a name brand than actual quality. I've seen a few guys at the local shop running those $150 harbor freight ones for a year now with no issues, so maybe check if you got a dud. Tbh, the $450 model might actually save you money in the long run if it lasts longer than a few months. Ngl, I skipped the middle ground and went straight for a used commercial one off Craigslist for $200, and it's been solid for six months now.

Check the oil return line bracket attachment point while you're at it. On older Lycomings, I've seen that bracket itself develop fatigue cracks where it meets the accessory case, not just the gearbox casting. A friend had one fail completely in flight on a 172 out of KSEE - the bracket let go, the line started whipping around, and it dumped enough oil to drop pressure before he got it shut down. I clean the area with brake cleaner, then use a 10x loupe to inspect both the gearbox casting and that bracket edge every annual now.