Perhaps the LPA you're using is different than the ones I'm familiar with. I can't tell from the photo.
My P-210s didn't have adjustable sights, and the one I've shot that did -- a 210-5 (Olympic Target model) had an adjustable, but its wasn't at all like the LPA. I've had LPAs on three different guns.
The reason I don't like the LPAs -- which are standard on the 85 Combat and the Kadet kit -- is that they aren't very precise. And they don't offer the best sight picture. (The LPA on the CZ-85 Combat and Kadet offers a sight picture that isn't that much better than the standard fixed sights.)
Bomars are considered one of the best. I've got them on a S&W and a AT-84S, and I've just installed Milletts on a Browning Hi-Power (pronounced Mil-lay). I also have an EAA Supersight on a Witness Sport Long Slide, and its a lot like the Bomar.
These sights all have a "click" adjustment that let you know exactly how much you've changed the sight elevation when you're working the controls. When you're trying sight in a gun, the CLICKS make it much easier to adjust the sight precisely.
Try a Bomar or a Millett and given a choice, you'll not go back to the LPAs. Both of these sights, however, will require a new dovetail cut in your gun, which raises the price.
That said, I picked up my Milletts from Gun Parts Corp for $24.95 (front and rear sight), and had them installed for $35. That beats the purchase price of the LPA. You'd not even have to have the front sight installed...