The tamper-proof torx bits kept me thinking today... First called around, no-one selling them near me. On the internet a couple of manufacturers were listed. Mac Tools, Snap-on, S-K Tools. Also found this:
[url="http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=43993&item=4555802962&rd=1&ssPageName=WD1V"]Ebay[/url]
Now I was wondering what size is needed, so I went to investigate tonight (click pics).
Big gaping hole

[url="http://euro.lexusownersclub.com/gallery/albums/is/DSCF2633.sized.jpg"][img]http://euro.lexusownersclub.com/gallery/albums/is/DSCF2633.thumb.jpg[/img][/url]
ECU box [url="http://euro.lexusownersclub.com/gallery/albums/is/DSCF2632.sized.jpg"][img]http://euro.lexusownersclub.com/gallery/albums/is/DSCF2632.thumb.jpg[/img][/url]
ECU box w/o cover [url="http://euro.lexusownersclub.com/gallery/albums/is/DSCF2631.sized.jpg"][img]http://euro.lexusownersclub.com/gallery/albums/is/DSCF2631.thumb.jpg[/img][/url]
ECU plugs [url="http://euro.lexusownersclub.com/gallery/albums/is/DSCF2630.sized.jpg"][img]http://euro.lexusownersclub.com/gallery/albums/is/DSCF2630.thumb.jpg[/img][/url]
ECU box - empty [url="http://euro.lexusownersclub.com/gallery/albums/is/DSCF2629.sized.jpg"][img]http://euro.lexusownersclub.com/gallery/albums/is/DSCF2629.thumb.jpg[/img][/url]
ECU - backside [url="http://euro.lexusownersclub.com/gallery/albums/is/DSCF2628.sized.jpg"][img]http://euro.lexusownersclub.com/gallery/albums/is/DSCF2628.thumb.jpg[/img][/url]
ECU - front cover [url="http://euro.lexusownersclub.com/gallery/albums/is/DSCF2625.sized.jpg"][img]http://euro.lexusownersclub.com/gallery/albums/is/DSCF2625.thumb.jpg[/img][/url]
ECU - PCB backside [url="http://euro.lexusownersclub.com/gallery/albums/is/DSCF2626.sized.jpg"][img]http://euro.lexusownersclub.com/gallery/albums/is/DSCF2626.thumb.jpg[/img][/url]
ECU - PCB frontside [url="http://euro.lexusownersclub.com/gallery/albums/is/DSCF2627.sized.jpg"][img]http://euro.lexusownersclub.com/gallery/albums/is/DSCF2627.thumb.jpg[/img][/url]
Hey, wait a minute - no anti-tamper torx? The whole box looked and felt like it had never been opened, and the bolts and screws were seized really tight. But just ordinary crosspoint screws. One less problem then. I wonder where the piggyback module would be connected. Seems like a soldering job?
Plugged everything back in, car purred like a charm like before. I guess now I've made an ECU reset. It's great working on these cars, really well put together

.
RFC,
RX-Men-8
P.S. Full res pics at [url="http://euro.lexusownersclub.com/gallery/view_album.php?set_albumName=is&page=166"]Euro Gallery[/url]