I have three lagers on the secondary that will be ready at Christmas/New Years: Intl Pale Lager, Intl Amber Lager and Helles.
Each were initially using a blow-off tube, then all were fermented under 13psi in Corneys. I had my son build some pressure relief valves (red) to work at that pressure.
When I transferred the Intl Pale Lager, it was the best beer I'd ever sampled out of the primary. Being under 13psi, there was some natural carbonation when I tasted it - super fine/small bubbles.
After ~two weeks in the secondary the three have not cleared yet, but there is an obvious benefit. Very smooth. The Intl Pale Lager was a variation of a beer that won 1st Place at CA State Homebrew Competition and is much better than what won. This could be a mid-40 score beer which is difficult in that category.
The Helles is also turning out very nice. The Intl Amber seems fine at this point, but will keep monitoring.
Not likely going back an airlock.
The next three lagers will come off the primary next week: Pre-prohibition, Intl Dark Lager and American Lager. All of these are new recipes using the same yeast - WLP840 American Lager yeast. The Intl Dark Lager is my attempt to recreate the Dixie Voodoo Lager - I figure it will take me several batches to fine tune as I likely will need a different yeast and other subtle tweaks.