I haven't ran my 28-8 yet, but I've run the Picco .28 for about 5 quarts of fuel and it's a total beast. I find the Picco more refined, and the piston/liner fit is tighter in the Picco. I don't know how picky the Nova is on glow plugs, but the Picco is kinda picky. Maybe the newer versions of the Piccos aren't as picky? The glow plug deal is my only real complaint with the Picco. I ordered some P6S plugs for my P3 .28.

Neal - does Picco still make the P3 .28s or are they discontinued in favor of the Boost series?