I would recommend going with a 1/4 to 1/2 lb. addition of Carapils as opposed to mashing at higher temps. The additon of Carapils will increase the body of the beer without decreasing the fermentability of the wort or adding sweetness. This will also give the the crisp, clean finish desired in a Bo-pils. Using a decoction mash without the Carapils is also an option.