we only have our machining done in VW precision. probably the best machine shop in manila. they charge pretty high for most work but you can be sure of the work they do. things as simple as refacing can really be botched up by tabi tabi machine shops that use rough stones for refacing (believe me). the figures quoted are always rough estimates since we cannot see how bad the actual damage is until you open up the engine. i prefer giving a higher estimate so that it encompasses most of the work that needs to be done rather than giving a low one (just to get you to have the work done with us) then once nabuksan ang dami pa pala kelangan idagdag and the estimate is next to useless.