1. LBT Q2 2008 Engineering Review SAB Static Balancing

2. 21-July-2008LBT Q2 2008 Engineering Review Highlights (Q2/2008) Schedule has been redefined as: Schedule has been redefined as: Design Review: Completed Design Review: Completed Manufacturing start: End of July Manufacturing start: End of July Delivery to Mountain: First week of September Delivery to Mountain: First week of September Project complete (final acceptance): Beginning of September Project complete (final acceptance): Beginning of September Amount of counterweights approximated Amount of counterweights approximated ~Maximum of 20-22 tonnes total needed for -Z ~Maximum of 20-22 tonnes total needed for -Z Management Plan document completed and archived. Management Plan document completed and archived. Technical Specification document completed, reviewed, and archived. Technical Specification document completed, reviewed, and archived. Reference document indicating the distribution of static weight included in archive. Reference document indicating the distribution of static weight included in archive. Two quotes have been received by one vendor. The first quote was larger than budget. Second quote within budget, but only for mounts and not trim plates. Two quotes have been received by one vendor. The first quote was larger than budget. Second quote within budget, but only for mounts and not trim plates.

3. 21-July-2008LBT Q2 2008 Engineering Review Progress (Q2/2008) Design and fabricate –Z ctwts., mounts, and placement. Design and fabricate –Z ctwts., mounts, and placement. √ - design complete √ - design complete √ - weight placement chosen √ - weight placement chosen Get quotes for fabrication of -Z ctrwts. and mounts. Get quotes for fabrication of -Z ctrwts. and mounts. √ - awaiting more quote responses √ - awaiting more quote responses Required documents completed. √ Required documents completed. √ Completed Technical Specification document to be reviewed. √ Completed Technical Specification document to be reviewed. √ Verify weight needed and location. √ Verify weight needed and location. √ Verify installation procedure. √ Verify installation procedure. √

4. 21-July-2008LBT Q2 2008 Engineering Review Open Issues Technical Technical None None Schedule Schedule Manufacturing time within allowable limits and abilities of prospective fabricators Manufacturing time within allowable limits and abilities of prospective fabricators Delivery and installation does not interfere with future telescope procedures and planning Delivery and installation does not interfere with future telescope procedures and planning Financial Financial Quotes stay within range of budget Quotes stay within range of budget Resource Resource Fabrication quotes, fabrication time, transportation Fabrication quotes, fabrication time, transportation

5. 21-July-2008LBT Q2 2008 Engineering Review Planning (Q3/2008) Respond to quotes Respond to quotes Start fabrication and then install Start fabrication and then install