Going to drop it off at a qualified machine shop on Monday. I am a technician at the local Honda dealership and thats where we send all of our heads for cleaning/inspection/valve guides etc. We have been sending k24 heads out like crazy to get seals and guides replaced and occasionally the odd valve. I think the k24 and my k20a are very similar. I will replace all the bad valves with genuine Honda K20A2 valves which I am sure are the same as the K20a valves. I will also replace any guides/seals they say are no good. The last one we sent out at work only took 2 days. I am pretty sure I have the only K20A in the city I live in. The closest one I know of is a couple hours drive away so sourcing a new head isn't really an option,Awesome, depending on the market, either replace & refresh the valves or get an other head.
What a nightmare indeed.Just read through your saga. What a nightmare. Here's hoping the shop fixes it. Hard to see how they could not check the valves were seated before sending it out - what a mess!