Pioneer - CT-WR504R Dual Auto-Reverse Stereo Audio-cassette deck

Pioneer CT-W504R Stereo Double Cassette Deck, manufactured between 1994 and 1996. It features dual auto-reverse, Dolby B/C Noise Reduction, HX Pro, and Pioneer's Auto BLE / FLEX system.
This unit has received basic maintenance and is being offered with full transparency regarding its condition:
New Belts Installed: Fitted with brand-new drive belts.
Heads Cleaned: Tape heads, capstans, and pinch rollers have been cleaned using high-purity isopropyl alcohol (IPA).
Contact Maintenance: Switches and contacts treated with contact cleaner spray.
Important Note on Rewind/Fast Forward (FF/REW): The fast winding / rewinding function works intermittently (sometimes works, sometimes stops after a few seconds). This is likely due to mechanism calibration or fine-tuning, which I do not know how to perform.
Playback & Audio: Playback and standard tape operations work, but the buyer should consider the unit as needing calibration/minor service for the winding mechanism.
Key Features & Specifications:
Brand: Pioneer
Model: CT-W504R
Production Years: 1994 – 1996
Type: Double Compact Cassette Deck
Track System: 4-track, 2-channel stereo
Features: Dual Auto-Reverse, High-Speed Dubbing, Dolby B/C NR, Dolby HX Pro
Color: Black
Weight: Approx. 4.2 kg (net) / ~5.5 kg packed
Condition:
Technical condition: Intermittent fast winding (FF/REW) issue as described above. Requires calibration/minor attention.
Cosmetic condition: Very good vintage condition with minor signs of prior use consistent with age. Please review the high-resolution photos carefully.
Packaging & Shipping:
The item will be packed with extreme care using bubble wrap and a sturdy box to ensure safe transport.
Shipped with tracking and insurance provided.