Yeah, I built a Sileighty nearly three years ago. No longer my ride though since an accident.
I prefer the Sileighty to the Zenki 180s. It reduces the length of the car by about 2" and the side profile imho looks a lot nicer.
But for drifting in Europe I dont really think its the best option. If you bang a panel you cant just put a wanted post up and have the part(s) by the end of the week - they would have to be got in from Japan. Not ideal ti say the least.
Hence why I have LOTS of spare S14 front end parts